Yamaha 50H (2020), 40V (2020) User guide

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Page 1

OWNER’S MANUAL

Read this manual carefully before operating this

outboard motor.

40V 50H

63B-28199-7N-E0

Page 2

EMU25053

Read this manual carefully before operating this outboard motor. Keep this manual onboard in a waterproof bag when boating. This manual should stay with the outboard motor if it is sold.

Page 3

Important manual information

TIP:

EMU25108

To the owner

Thank you for selecting a Yamaha outboard motor. This Owner’s Manual contains information needed for proper operation, maintenance and care. A thorough understanding of these simple instructions will help you obtain maximum enjoyment from your new Yamaha. If you have any question about the operation or maintenance of your outboard motor, please consult a Yamaha dealer. In this Owner’s Manual particularly important information is distinguished in the following ways.

: This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death.

EWM00782

A WARNING indicates a hazardous situation which, if not avoided, could result in death or serious injury.

ECM00702

A NOTICE indicates special precautions that must be taken to avoid damage to the outboard motor or other property.

there is any question concerning this manual, please consult your Yamaha dealer. To ensure long product life, Yamaha recommends that you use the product and perform the specified periodic inspections and maintenance by correctly following the instructions in the owner’s manual. Any damage resulting from neglect of these instructions is not covered by warranty. Some countries have laws or regulations restricting users from taking the product out of the country where it was purchased, and it may be impossible to register the product in the destination country. Additionally, the warranty may not apply in certain regions. When planning to take the product to another country, consult the dealer where the product was purchased for further information. If the product was purchased used, please consult your closest dealer for customer reregistration, and to be eligible for the specified services.

The 40VEO, 40VMHO, 50HETO and the standard accessories are used as a base for the explanations and illustrations in this manual. Therefore some items may not apply to every model.

EMU25123

A TIP provides key information to make procedures easier or clearer.

Yamaha continually seeks advancements in product design and quality. Therefore, while this manual contains the most current product information available at the time of printing, there may be minor discrepancies between your machine and this manual. If

40V, 50H

OWNER’S MANUAL

1st Edition, November 2019

Any reprinting or unauthorized use

without the written permission of

Yamaha Motor Co., Ltd. is expressly prohibited.

Printed in Japan

Page 4

Table of contents

Safety information............................. 1

Outboard motor safety .....................1

Propeller .............................................. 1

Rotating parts ...................................... 1

Hot parts.............................................. 1

Electric shock ...................................... 1

Power trim and tilt................................ 1

Engine shut-off cord (lanyard) ............. 1

Gasoline .............................................. 2

Gasoline exposure and spills .............. 2

Carbon monoxide ................................ 2

Modifications ....................................... 2

Boating safety ..................................2

Alcohol and drugs................................ 2

Personal flotation devices (PFDs) ....... 2

People in the water.............................. 2

Passengers ......................................... 2

Overloading ......................................... 3

Avoid collisions.................................... 3

Collisions with floating or submerged

objects.............................................. 3

Weather............................................... 4

Passenger training .............................. 4

Boating safety publications.................. 4

Laws and regulations .......................... 4

General information .......................... 5

Identification numbers record...........5

Outboard motor serial number ............ 5

Key number ......................................... 5

EC Declaration of Conformity

(DoC)............................................. 5

CE Marking ......................................6

Read manuals and labels................. 7

Warning labels .................................... 7

Specifications and requirements... 10

Specifications ................................. 10

Installation requirements ................ 11

Boat horsepower rating ..................... 11

Mounting outboard motor .................. 11

Remote control requirements.........11

Battery requirements......................12

Battery specifications ........................ 12

Propeller selection ......................... 12

Start-in-gear protection .................. 13

Engine oil requirements ................. 13

Why Yamalube .................................. 13

Fuel requirements.......................... 13

Gasoline ............................................13

Muddy or acidic water.................... 14

Anti-fouling paint ............................ 14

Outboard motor disposal

requirements............................... 14

Emergency equipment................... 15

Components .................................... 16

Components diagram..................... 16

Fuel tank............................................ 18

Fuel joint............................................ 19

Fuel gauge ........................................ 19

Fuel tank cap..................................... 19

Air vent screw.................................... 19

Remote control box ...........................19

Remote control lever .........................19

Neutral interlock trigger .....................20

Neutral throttle lever .......................... 20

Tiller handle ...................................... 20

Gear shift lever ................................. 20

Throttle grip ......................................20

Throttle indicator ............................... 21

Throttle friction adjuster..................... 21

Engine shut-off cord (lanyard) and

clip.................................................. 21

Engine stop button ........................... 22

Pull-type choke knob ......................... 22

Manual starter handle........................ 22

Main switch........................................ 23

Steering friction adjuster ................... 23

Steering friction adjuster.................... 23

Power trim and tilt switch on remote

control or tiller handle..................... 24

Power trim and tilt switch on bottom

cowling ........................................... 24

Trim tab with anode........................... 25

Trim rod (tilt pin) ................................25

Tilt lock mechanism........................... 25

Page 5

Table of contents

Tilt support lever for power trim and

tilt model......................................... 26

Tilt support lever for manual tilt

model ............................................. 26

Cowling lock lever(s) (turn type)........ 26

Alert indicator ................................... 27

Instruments and indicators ............ 28

Indicators ....................................... 28

Alert indicator for three indicators...... 28

Overheat-alert indicator..................... 28

Oil level-alert indicator....................... 28

Digital tachometer ..........................28

Tachometer ....................................... 29

Trim meter ......................................... 29

Hour meter ........................................ 29

Oil level indicator (digital type) .......... 29

Overheat-alert indicator..................... 30

Analog tachometer ......................... 30

Oil level indicators (three

indicators 2) ................................... 30

Analog trim meter...........................31

Engine control system.................... 32

Alert system ...................................32

Overheat alert.................................... 32

Oil level alert and oil filter clogging

alert ................................................ 33

Installation .......................................35

Installation ...................................... 35

Mounting the outboard motor ............ 35

Clamping the outboard motor............ 36

Operation .........................................38

First-time operation ........................ 38

Breaking in engine............................. 38

Getting to know your boat ................. 38

Checks before starting engine .......38

Fuel level ........................................... 39

Remove the top cowling .................... 39

Fuel system ....................................... 39

Controls ............................................. 39

Engine shut-off cord (lanyard) ........... 40

Oil ...................................................... 40

Engine ...............................................40

Operation after long period of

storage ........................................... 40

Install top cowling .............................. 41

Power trim and tilt system .................41

Battery ............................................... 42

Filling fuel and engine oil ............... 42

Filling fuel for portable tank ...............42

Filling oil for manual starter model .... 43

Filling oil for electric start models ......43

Oil level indicator operation ............... 45

Operating engine ........................... 46

Sending fuel (portable tank) ..............46

Starting engine ..................................47

Checks after starting engine .......... 51

Cooling water .................................... 51

Warming up engine........................ 51

Choke start models ........................... 51

Electric start and prime start

models ........................................... 52

Checks after engine warm up ........ 52

Shifting .............................................. 52

Stop switches ....................................52

Shifting........................................... 52

Stopping boat................................. 53

Stopping engine............................. 54

Procedure.......................................... 54

Trimming outboard motor............... 55

Adjusting trim angle for manual tilt

models ........................................... 55

Adjusting trim angle (Power trim

and tilt) ...........................................56

Adjusting boat trim............................. 57

Tilting up and down........................ 58

Procedure for tilting up (manual tilt

models) ..........................................58

Procedure for tilting up (power trim

and tilt models)............................... 59

Procedure for tilting down (manual

tilt models)...................................... 60

Procedure for tilting down (power

trim and tilt models)........................ 60

Page 6

Table of contents

Shallow water ................................61

Power trim and tilt models ................. 61

Cruising in other conditions............62

Maintenance..................................... 63

Transporting and storing outboard

motor ........................................... 63

Clamp screw mounting models ......... 63

Storing outboard motor...................... 63

Procedure.......................................... 64

Lubrication......................................... 65

Cleaning the outboard motor............. 65

Checking painted surface of

outboard motor............................... 65

Periodic maintenance..................... 65

Replacement parts ............................ 66

Severe operating conditions.............. 66

Maintenance chart 1.......................... 67

Maintenance chart 2.......................... 69

Greasing............................................ 70

Cleaning and adjusting spark plug .... 71

Checking fuel filter............................. 72

Inspecting idle speed......................... 72

Checking water in engine oil tank...... 73

Inspecting wiring and connectors ...... 73

Checking propeller ............................ 73

Removing propeller ........................... 74

Installing propeller ............................. 74

Changing gear oil .............................. 75

Cleaning fuel tank.............................. 77

Inspecting and replacing anode(s) .... 77

Checking battery (for electric start

models) .......................................... 78

Connecting the battery ...................... 78

Disconnecting the battery.................. 79

Engine fails to operate ................... 86

Cold engine fails to start.................... 86

Treatment of submerged motor ..... 88

INDEX ............................................... 89

Trouble Recovery............................ 80

Troubleshooting .............................80

Temporary action in emergency..... 83

Impact damage.................................. 83

Replacing fuse................................... 83

Power trim and tilt will not operate .... 84

Starter will not operate ...................... 84

Emergency starting engine................ 85

Page 7

Safety information

EMU33623

Outboard motor safety

Observe these precautions at all times.

EMU36502

Propeller

People can be injured or killed if they come in contact with the propeller. The propeller can keep moving even when the motor is in neutral, and sharp edges of the propeller can cut even when stationary.

 Stop the engine when a person is in the

water near you.

 Keep people out of reach of the propeller,

even when the engine is off.

EMU40272

Rotating parts

Hands, feet, hair, jewelry, clothing, personal flotation device (PFD) straps, etc., can become entangled with internal rotating parts of the engine, resulting in serious injury or death. Keep the top cowling in place whenever possible. Do not remove or replace the top cowling with the engine running. Only operate the engine with the top cowling removed according to the specific instructions in the manual. Keep hands, feet, hair, jewelry, clothing, PFD straps, etc., away from any exposed moving parts.

EMU33641

Hot parts

During and after operation, engine parts are hot enough to cause burns. Avoid touching any parts under the top cowling until the engine has cooled.

EMU33651

Electric shock

Do not touch any electrical parts while starting or operating the engine. They can cause

shock or electrocution.

EMU33662

Power trim and tilt

Body parts can be crushed between the motor and the clamp bracket when the motor is trimmed or tilted. Keep body parts out of this area at all times. Be sure no one is in this area before operating the power trim and tilt mechanism. The power trim and tilt switches operate even when the main switch is off. Keep people away from the switches whenever working around the motor. Never get under the lower unit while it is tilted, even when the tilt support lever is locked. Severe injury could occur if the outboard motor accidentally falls.

EMU33672

Engine shut-off cord (lanyard)

Attach the engine shut-off cord so that the engine stops if the operator falls overboard or leaves the helm. This prevents the boat from running away under power and leaving people stranded, or running over people or objects. Always attach the engine shut-off cord to a secure place on your clothing or your arm or leg while operating. Do not remove it to leave the helm while the boat is moving. Do not attach the cord to clothing that could tear loose, or route the cord where it could become entangled, preventing it from functioning. Do not route the cord where it is likely to be accidentally pulled out. If the cord is pulled during operation, the engine will shut off and you will lose most steering control. The boat could slow rapidly, throwing people and objects forward.

Page 8

Safety information

EMU33811

Gasoline

Gasoline and its vapors are highly flammable and explosive. Always, refuel ac-

cording to the procedure on page 46 to reduce the risk of fire and explosion.

EMU33821

Gasoline exposure and spills

Take care not to spill gasoline. If gasoline spills, wipe it up immediately with dry rags. Dispose of rags properly. If any gasoline spills onto your skin, immediately wash with soap and water. Change clothing if gasoline spills on it. If you swallow gasoline, inhale a lot of gasoline vapor, or get gasoline in your eyes, get immediate medical attention. Never siphon fuel by mouth.

EMU33901

Carbon monoxide

This product emits exhaust gases which contain carbon monoxide, a colorless, odorless gas which may cause brain damage or death when inhaled. Symptoms include nausea, dizziness, and drowsiness. Keep cockpit and cabin areas well ventilated. Avoid blocking exhaust outlets.

EMU33781

Modifications

Do not attempt to modify this outboard motor. Modifications to your outboard motor may reduce safety and reliability, and render the outboard unsafe or illegal to use.

EMU33742

Boating safety

This section includes a few of the many important safety precautions that you should follow when boating.

EMU33711

Alcohol and drugs

Never operate after drinking alcohol or taking drugs. Intoxication is one of the most common factors contributing to boating fatalities.

EMU40281

Personal flotation devices (PFDs)

Have an approved PFD on board for every occupant. Yamaha recommends that you must wear a PFD whenever boating. At a minimum, children and non-swimmers should always wear PFDs, and everyone should wear PFDs when there are potentially hazardous boating conditions.

EMU33732

People in the water

Always watch carefully for people in the water, such as swimmers, skiers, or divers, whenever the engine is running. When someone is in the water near the boat, shift into neutral and stop the engine. Stay away from swimming areas. Swimmers can be hard to see. The propeller can keep moving even when the motor is in neutral. Stop the engine when a person is in the water near you.

EMU33752

Passengers

Consult your boat manufacturer’s instructions for details about appropriate passenger locations in your boat and be sure all passengers are positioned properly before accelerating and when operating above an idle speed. Standing or sitting in non-designated locations may result in being thrown either overboard or within the boat due to waves, wakes, or sudden changes in speed or direction. Even when people are positioned properly, alert your passengers if you must make

Page 9

Safety information

ZMU06025

any unusual maneuver. Always avoid jumping waves or wakes.

EMU33763

Overloading

Do not overload the boat. Consult the boat capacity plate or boat manufacturer for maximum weight and number of passengers. Be sure that weight is properly distributed according to the boat manufacturer’s instructions. Overloading or incorrect weight distribution can compromise the boat’s handling and lead to an accident, capsizing or swamping.

EMU33773

Avoid collisions

Scan constantly for people, objects, and other boats. Be alert for conditions that limit your visibility or block your vision of others.

Operate defensively at safe speeds and keep a safe distance away from people, objects, and other boats.

 Do not follow directly behind other boats or

waterskiers.

 Avoid sharp turns or other maneuvers that

make it hard for others to avoid you or understand where you are going.

 Avoid areas with submerged objects or

shallow water.

 Ride within your limits and avoid aggres-

sive maneuvers to reduce the risk of loss

of control, ejection, and collision.

 Take early action to avoid collisions. Re-

member, boats do not have brakes, and stopping the engine or reducing throttle can reduce the ability to steer. If you are not sure that you can stop in time before hitting an obstacle, apply throttle and turn in another direction.

EMU48100

Collisions with floating or submerged objects

If the outboard motor hits a floating object or an obstacle in the water while cruising, the following could occur:

 The passengers and any loose equipment

or luggage could be thrown forward due to the sudden deceleration.

 Parts of the outboard motor could come

loose as a result of the impact and could be thrown into the boat.

 The boat or outboard motor could be dam-

aged as a result of the impact. When you operate the boat in an area where there might be floating objects or obstacles in the water, be sure to adjust the trim angle of the outboard motor, slow down, and operate carefully. For further information, see page 61. If the outboard motor hits a floating object or an obstacle in the water, make sure that there are no abnormalities with the boat and the outboard motor. If anything abnormal is found, return to the nearest harbor at low speed and have a Yamaha dealer inspect the outboard motor.

Page 10

Safety information

EMU33791

Weather

Stay informed about the weather. Check weather forecasts before boating. Avoid boating in hazardous weather.

EMU33881

Passenger training

Make sure at least one other passenger is trained to operate the boat in the event of an emergency.

EMU33891

Boating safety publications

Be informed about boating safety. Additional publications and information can be obtained from many boating organizations.

EMU33602

Laws and regulations

Know the marine laws and regulations where you will be boating—and obey them. Several sets of rules prevail according to geographic location, but all are basically the same as the International Rules of the Road.

Page 11

General information

ZMU02931

3412

EMU25172

Identification numbers record

EMU25186

Outboard motor serial number

The outboard motor serial number is stamped on the label attached to the port side of the clamp bracket. Record your outboard motor serial number in the spaces provided to assist you in ordering spare parts from your Yamaha dealer or for reference in case your outboard motor is stolen.

1. Outboard motor serial number location

1. Serial number

2. Model name

3. Motor transom height

4. Approved model code

EMU25192

Key number

If a main key switch is equipped with the motor, the key identification number is stamped on your key as shown in the illustration. Record this number in the space provided for reference in case you need a new key.

1. Key number

EMU38983

EC Declaration of Conformity

(DoC)

This declaration is included with outboard motors that conform to European regulations. This outboard motor conforms to certain portions of the European Parliament directive relating to machinery. Each conformed outboard motor accompanied with EC DoC. EC DoC contains the following information;

 Name of engine manufacturer  Model name  Product code of model (Approved model

code)

 Code of conformed directives

Page 12

General information

ZMU06040

EMU38995

CE Marking

This label is affixed to outboard motors that conform to European regulations. Outboard motors affixed with this “CE” marking conform with the directives of; 2006/42/EC, 94/25/EC - 2003/44/EC, 2014/30/EU, and 2004/108/EC, 2013/53/EU.

1. CE marking location

Page 13

General information

ZMU07315

EMU33524

Read manuals and labels

Before operating or working on this outboard motor:

 Read this manual.  Read any manuals supplied with the boat.  Read all labels on the outboard motor and the boat.

If you need any additional information, contact your Yamaha dealer.

EMU33836

Warning labels

If these labels are damaged or missing, contact your Yamaha dealer for replacements.

Page 14

General information

6EE-G2794-40

6EE-G2794-50

6EE-H1994-40

6EE-H1994-50

6EE-H1995-40

6EE-H1995-50

ZMU05706

EMU33913

Contents of labels

The above warning labels mean as follows.

EWM01692

Emergency starting does not have startin-gear protection. Ensure shift control is in neutral before starting engine.

EWM01682

 Keep hands, hair, and clothing away

from rotating parts while the engine is running.

 Do not touch or remove electrical parts

when starting or during operation.

EWM01672

 Read Owner’s Manuals and labels.  Wear an approved personal flotation

device (PFD).

 Attach engine shut-off cord (lanyard) to

your PFD, arm, or leg so the engine

stops if you accidentally leave the

helm, which could prevent a runaway

boat.

Page 15

General information

ZMU05664

ZMU05666

ZMU05667

ZMU05668

EMU33844

Symbols

The following symbols mean as follows.

Notice/Warning

ZMU05696

Read Owner’s Manual

Electrical hazard

Remote control lever/gear shift lever operating direction, dual direction

Engine start/ Engine cranking

Hazard caused by continuous rotation

ZMU05665

Page 16

Specifications and requirements

TIP:

EMU38092

Specifications

“(AL)” stated in the specification data below represents the numerical value for the aluminum propeller installed.

EMU48360

Dimension and weight:

Overall length:

1281 mm (50.4 in) (40VMHO) 670 mm (26.4 in) (40VEO, 50HETO)

Overall width:

349 mm (13.7 in) (40VEO, 40VMHO) 360 mm (14.2 in) (50HETO)

Overall height S:

1223 mm (48.1 in) (40VMHO)

Overall height L:

1319 mm (51.9 in) (40VEO, 50HETO) 1350 mm (53.1 in) (40VMHO)

Motor transom height S:

406 mm (16.0 in) (40VMHO)

Motor transom height L:

533 mm (21.0 in)

Dry weight (AL) S:

76 kg (167 lb) (40VMHO)

Dry weight (AL) L:

77 kg (170 lb) (40VEO) 78 kg (171 lb) (40VMHO) 88 kg (194 lb) (50HETO)

Performance:

Full throttle operating range:

4500–5500 r/min

Rated power:

29.4 kW (40 HP) (40VEO, 40VMHO)

36.8 kW (50 HP) (50HETO)

Idle speed (in neutral):

750–850 r/min

Power unit:

Type:

2-stroke L3

Total displacement:

Bore  stroke:

Ignition system:

Spark plug with resistor (NGK):

Spark plug gap:

Steering system:

Starting system:

Starting carburetion system:

Battery rating (CCA/EN):

Battery rating (20HR/IEC):

Alternator output:

Maximum generator output:

Lower unit:

Gear shift positions:

Gear ratio:

Trim and tilt system:

Propeller mark:

698 cm

67.0  66.0 mm (2.64  2.60 in)

CDI

BR7HS-10 (40VEO, 40VMHO) BR8HS-10 (50HETO)

0.9–1.0 mm (0.035–0.039 in)

Remote steering (40VEO, 50HETO) Tiller handle (40VMHO)

Electric starter (40VEO, 50HETO) Manual starter (40VMHO)

Choke valve (40VMHO) Prime start (40VEO, 50HETO)

347–411 A (40VEO, 50HETO)

40 Ah (40VEO, 50HETO)

80 W (40VMHO)

6 A (40VEO, 50HETO)

Forward-neutral-reverse

1.85 (24/13)

Manual tilt (40VEO, 40VMHO) Power trim and tilt (50HETO)

(42.6 c.i.)

Page 17

Specifications and requirements

Fuel and oil:

Recommended fuel:

Regular unleaded gasoline

Min. research octane number (RON):

Fuel tank capacity:

24 L (6.34 US gal, 5.28 Imp.gal)

Recommended engine oil:

YAMALUBE 2-stroke outboard motor oil

Recommended engine oil:

TC-W3

Lubrication system:

Oil injection

Engine oil tank capacity:

1.5 L (1.59 US qt, 1.32 Imp.qt)

Recommended gear oil:

YAMALUBE outboard gear oil or Hypoid gear oil

Recommended gear oil grade:

SAE 90 API GL-4

Gear oil quantity:

0.430 L (0.455 US qt, 0.378 Imp.qt)

Noise and vibration level:

Operator sound pressure level (ICOMIA 39/94):

89.5 dB(A) (40VEO, 40VMHO)

Vibration on tiller handle (ICOMIA 38/94):

Vibration on tiller handle is under 2.5

m/s

(40VMHO)

EMU33556

Installation requirements

EMU33566

Boat horsepower rating

EWM01561

Overpowering a boat can cause severe instability.

Before installing the outboard motor(s), confirm that the total horsepower of your outboard motor(s) does not exceed the boat’s maximum horsepower rating. See the boat’s capacity plate or contact the manufacturer.

EMU40491

Mounting outboard motor

EWM02501

 Improper mounting of the outboard mo-

tor could result in hazardous condi-

tions such as poor handling, loss of

control, or fire hazards.

 Because the outboard motor is very

heavy, special equipment and training

is required to mount it safely.

Your dealer or other person experienced in proper rigging should mount the outboard motor using correct equipment and complete rigging instructions. For further information, see page 35.

EMU33582

Remote control requirements

EWM01581

 If the engine starts in gear, the boat can

move suddenly and unexpectedly, pos-

sibly causing a collision or throwing

passengers overboard.

 If the engine ever starts in gear, the

Page 18

Specifications and requirements

ZMU04606

123

start-in-gear protection device is not working correctly and you should discontinue using the outboard. Contact your Yamaha dealer.

The remote control unit must be equipped with a start-in-gear protection device(s). This device prevents the engine from starting unless it is in neutral.

EMU25695

Battery requirements

EMU25723

Battery specifications

Battery rating (CCA/EN):

347–411 A (40VEO, 50HETO)

Battery rating (20HR/IEC):

40 Ah (40VEO, 50HETO)

The engine cannot be started if battery voltage is too low.

EMU36293

Mounting battery

Mount the battery holder securely in a dry, well-ventilated, vibration-free location in the boat. WARNING! Do not put flammable

items, or loose heavy or metal objects in the same compartment as the battery. Fire, explosion or sparks could result.

[EWM01821]

Battery cable

The battery cable size and length are critical. Consult your Yamaha dealer about the battery cable size and length.

make. The type, size, and design of your propeller have a direct impact on acceleration, top speed, fuel economy, and even engine life. Yamaha designs and manufactures propellers for every Yamaha outboard motor and every application. Your outboard motor came with a Yamaha propeller selected to perform well over a range of applications, but there may be uses where a different propeller would be more appropriate. Your Yamaha dealer can help you select the right propeller for your boating needs. Select a propeller that will allow the engine to reach the middle or upper half of the operating range at full throttle with the maximum boatload. Generally, select a larger pitch propeller for a smaller operating load and a smaller pitch propeller for a heavier load. If you carry loads that vary widely, select the propeller that lets the engine run in the proper range for your maximum load but remember that you may need to reduce your throttle setting to stay within the recommended engine speed range when carrying lighter loads. To check the propeller, see page 73.

EMU34196

Propeller selection

Next to selecting an outboard motor, selecting the right propeller is one of the most important purchasing decisions a boater can

1. Propeller diameter in inches

2. Propeller pitch in inches

3. Type of propeller (propeller mark)

Page 19

Specifications and requirements

123

ZMU04607

1. Propeller diameter in inches

2. Propeller pitch in inches

3. Type of propeller (propeller mark)

EMU25771

Start-in-gear protection

Yamaha outboard motors or Yamaha-approved remote control units are equipped with start-in-gear protection device(s). This feature permits the engine to be started only when it is in neutral. Always select neutral before starting the engine.

EMU25653

Engine oil requirements

Recommended engine oil:

YAMALUBE 2-stroke outboard motor oil

If the recommended engine oil is not available, another 2-stroke engine oil with an NMMA-certified TC-W3 rating may be used.

EMU48120

Why Yamalube

YAMALUBE oil is a Genuine YAMAHA Part born of the engineers’ passion and belief that engine oil is an important liquid engine component. We form teams of specialists in the fields of mechanical engineering, chemistry, electronics and track testing, and have them

develop the engine together with the oil it will use. Yamalube oils take full advantage of the base oil’s qualities and blend in the ideal balance of additives to make sure the final oil clears our performance standards. Thus, Yamalube mineral, semisynthetic and synthetic oils have their own distinct characters and value. Yamaha’s experience gained over many years of research and development into oil since the 1960’s helps make Yamalube the best choice for your Yamaha engine.

EMU36361

Fuel requirements

EMU40203

Gasoline

Use a good quality gasoline that meets the minimum octane rating. If knocking or pinging occurs, use a different brand of gasoline or premium unleaded fuel.

Recommended fuel:

Regular unleaded gasoline

Min. research octane number (RON):

ECM01982

 Do not use leaded gasoline. Leaded

gasoline can seriously damage the en-

gine.

 Avoid getting water and contaminants

in the fuel tank. Contaminated fuel can

cause poor performance or engine

Page 20

Specifications and requirements

TIP:

E5 E10

damage. Use only fresh gasoline that has been stored in clean containers.

 This mark identifies the recommended fuel

for this outboard motor as specified by European regulation (EN228).

 Check that gasoline nozzle has the same

identifier when fueling.

Gasohol

There are two types of gasohol: gasohol containing ethanol (E5 and E10) and that containing methanol. Ethanol can be used if the ethanol content does not exceed 10% and the fuel meets the minimum octane ratings. E85 is a fuel containing 85% ethanol and must not be used in your outboard motor. All ethanol blends containing more than 10% ethanol can cause fuel system damage or cause engine starting and running problems. Yamaha does not recommend gasohol containing methanol because it can cause fuel system damage or engine performance problems. It is recommended that you install a waterseparating marine fuel filter assembly (10 micron minimum) between your boat’s fuel tank and outboard motor when using ethanol. Ethanol is known to allow moisture to be absorbed into boat fuel tanks and systems. Moisture in the fuel can cause corrosion of metallic fuel system components, starting

and running complaints and require additional fuel system maintenance.

EMU36881

Muddy or acidic water

Yamaha strongly recommends that you have your dealer install the optional chromiumplated water pump kit if you use the outboard motor in muddy or acidic water conditions. However, depending on the model it might not be required.

EMU36331

Anti-fouling paint

A clean hull improves boat performance. The boat bottom should be kept as clean of marine growth as possible. If necessary, the boat bottom can be coated with an anti-fouling paint approved for your area to inhibit marine growth. Do not use anti-fouling paint which includes copper or graphite. These paints can cause more rapid engine corrosion.

EMU40302

Outboard motor disposal

requirements

Never illegally discard (dump) the outboard motor. Yamaha recommends consulting the dealer about discarding the outboard motor.

Page 21

Specifications and requirements

EMU36353

Emergency equipment

Keep the following items onboard in case there is trouble with the outboard motor.

 A tool kit with assorted screwdrivers, pli-

ers, wrenches (including metric sizes), and electrical tape.

 Waterproof flashlight with extra batteries.  An extra engine shut-off cord (lanyard)

with clip.

 Spare parts, such as an extra set of spark

plugs.

Consult your Yamaha dealer for details.

Page 22

Components

TIP:

ZMU03344

4 5

6 7

EMU46722

Components diagram

* May not be exactly as shown; also may not be included as standard equipment on all models (order from dealer).

40VMHO

1. Manual starter handle

2. Tiller handle*

3. Choke knob

4. Alert indicator

5. Tilt lock lever

6. Clamp screw

7. Trim rod

8. Cooling water inlet

9. Propeller

10. Trim tab (anode)

11. Anti-cavitation plate

12. Anode

13. Tilt support lever

14. Clamp bracket

15. Top cowling

16. Fuel tank*

Page 23

40VEO

1. Oil tank filler cap

2. Alert indicator(s)

3. Tilt lock lever

4. Clamp screw

5. Trim rod

6. Battery cable

7. Propeller

8. Cooling water inlet

9. Trim tab (anode)

10. Anti-cavitation plate

11. Anode

12. Tilt support lever

13. Clamp bracket

14. Top cowling

15. Remote control box (side mount type)

16. Fuel tank*

Components

Page 24

Components

13 14 15

5 4

50HETO

1. Oil tank filler cap

2. Battery cable

3. Anode(s)

4. Propeller

5. Cooling water inlet

6. Trim tab (anode)

7. Anti-cavitation plate

8. Trim rod

9. Clamp bracket

10. Tilt support lever

11. Top cowling

12. Remote control box (side mount type)

13. Trim meter*

14. Tachometer*

15. Digital tachometer

16. Fuel tank*

EMU25804

Fuel tank

If your model was equipped with a portable fuel tank, its function is as follows.

EWM00021

The fuel tank supplied with this engine is its dedicated fuel reservoir and must not be used as a fuel storage container. Commercial users should conform to relevant licensing or approval authority regulations.

Page 25

Components

ZMU02284

1 2

ZMU01723

ZMU01725

1. Fuel joint

2. Fuel gauge

3. Fuel tank cap

4. Air vent screw

EMU25831

Fuel joint

This joint is used to connect the fuel line.

EMU25842

Fuel gauge

This gauge is located on either the fuel tank cap or on the fuel joint base. It shows the approximate amount of fuel remaining in the tank.

EMU25851

Fuel tank cap

This cap seals the fuel tank. When removed, the tank can be filled with fuel. To remove the cap, turn it counterclockwise.

EMU25861

Air vent screw

This screw is on the fuel tank cap. To loosen the screw, turn it counterclockwise.

1. Power trim and tilt switch

2. Remote control lever

3. Neutral interlock trigger

4. Neutral throttle lever

5. Main switch

6. Engine shut-off switch

7. Throttle friction adjuster

EMU26191

Remote control lever

Moving the lever forward from the neutral position engages forward gear. Pulling the lever back from neutral engages reverse. The engine will continue to run at idle until the lever is moved about 35 (a detent can be felt). Moving the lever farther opens the throttle, and the engine will begin to accelerate.

EMU26182

Remote control box

The remote control lever actuates both the shifter and the throttle. The electrical switches are mounted on the remote control box.

1. Neutral “ ”

2. Forward “ ”

3. Reverse “ ”

4. Shift

5. Fully closed

Page 26

Components

TIP:

ZMU01728

6. Throttle

7. Fully open

EMU26202

Neutral interlock trigger

To shift out of neutral, first pull the neutral interlock trigger up.

ZMU01727

1. Neutral interlock trigger

EMU26213

Neutral throttle lever

To open the throttle without shifting into either forward or reverse, put the remote control lever in the neutral position and lift the neutral throttle lever.

when the neutral throttle lever is in the closed position.

EMU25914

Tiller handle

To change direction, move the tiller handle to the left or right as necessary.

EMU25925

Gear shift lever

Move the gear shift lever forward to engage the forward gear or rearward to engage the reverse gear.

1. Fully open

2. Fully closed

The neutral throttle lever will operate only when the remote control lever is in neutral. The remote control lever will operate only

1. Forward “ ”

2. Neutral “ ”

3. Reverse “ ”

EMU25943

Throttle grip

The throttle grip is on the tiller handle. Turn the grip counterclockwise to increase speed and clockwise to decrease speed.

Page 27

EMU25963

111

ZMU03095

Throttle indicator

The fuel consumption curve on the throttle indicator shows the relative amount of fuel consumed for each throttle position. Choose the setting that offers the best performance and fuel economy for the desired operation.

Components

difficult to move the remote control lever or throttle grip, which could result in an accident.

[EWM00033]

1. Throttle indicator

EMU25978

Throttle friction adjuster

A friction device provides adjustable resistance to movement of the throttle grip or the remote control lever, and can be set according to operator preference. To increase resistance, turn the adjuster clockwise. To decrease resistance, turn the adjuster counterclockwise. WARNING! Do

not overtighten the friction adjuster. If there is too much resistance, it could be

When constant speed is desired, tighten the adjuster to maintain the desired throttle setting.

EMU25996

Engine shut-off cord (lanyard) and clip

The clip must be attached to the engine shutoff switch for the engine to run. The cord should be attached to a secure place on the operator’s clothing, or arm or leg. Should the operator fall overboard or leave the helm, the cord will pull out the clip, stopping ignition to the engine. This will prevent the boat from running away under power. WARNING! At-

tach the engine shut-off cord to a secure place on your clothing, or your arm or leg while operating. Do not attach the cord to

Page 28

Components

ZMU01716

222

333

ZMU03355

ZMU02942

clothing that could tear loose. Do not route the cord where it could become entangled, preventing it from functioning. Avoid accidentally pulling the cord during normal operation. Loss of engine power means the loss of most steering control. Also, without engine power, the boat could slow rapidly. This could cause people and objects in the boat to be thrown forward.

1. Engine shut-off cord (lanyard)

2. Clip

3. Engine shut-off switch

[EWM00123]

when the button is pushed.

EMU26015

Pull-type choke knob

Pull the choke knob to supply a rich fuel mixture to the engine.

1. Engine shut-off cord (lanyard)

2. Clip

3. Engine shut-off switch

EMU26004

Engine stop button

The engine stop button stops the engine

EMU26075

Manual starter handle

The manual starter handle is used to crank and start the engine.

Page 29

Components

TIP:

EMU26092

Main switch

The main switch controls the ignition system; its operation is described below.

 “” (off)

With the main switch in the “ ” (off) position, the electrical circuits are off, and the key can be removed.

 “” (on)

With the main switch in the “ ” (on) position, the electrical circuits are on, and the key cannot be removed.

 “” (start)

With the main switch in the “ ” (start) position, the starter motor turns to start the engine. When the key is released, it returns automatically to the “ ” (on) position.

STARTOFF

set according to operator preference. An adjuster lever is located on the bottom of the tiller handle bracket. To increase resistance, turn the lever to the port side “A”. To decrease resistance, turn the lever to the starboard side “B”.

EWM00041

Do not overtighten the friction adjuster. If there is too much resistance, it could be difficult to steer, which could result in an accident.

EMU26113

Steering friction adjuster

A friction device provides adjustable resistance to the steering mechanism, and can be

ZMU01718

 Check the tiller handle for smooth move-

ment when the lever is turned to the star-

board side “B”.

 Do not apply lubricants such as grease to

the friction areas of the steering friction ad-

juster.

EMU26124

Steering friction adjuster

A friction device provides adjustable resistance to the steering mechanism, and can be set according to operator preference. An adjusting screw or bolt is located on the swivel bracket.

Page 30

Components

ZMU02908

ZMU01720

To increase resistance, turn the adjuster clockwise. To decrease resistance, turn the adjuster counterclockwise.

EWM00041

Do not overtighten the friction adjuster. If there is too much resistance, it could be difficult to steer, which could result in an accident.

EMU26144

Power trim and tilt switch on remote control or tiller handle

The power trim and tilt system adjusts the outboard motor angle in relation to the transom. Pressing the switch “ ” (up) trims the outboard motor up, and then tilts it up. Pressing the switch “ ” (down) tilts the outboard motor down and trims it down. When the switch is released, the outboard motor will stop in its current position. For instructions on using the power trim and tilt switch, see pages 55 and 58.

EMU26156

Power trim and tilt switch on bottom cowling

The power trim and tilt switch is located on the side of the bottom cowling. Pushing the switch “ ” (up) trims the outboard motor up, and then tilts it up. Pushing the switch “ ” (down) tilts the outboard motor down and trims it down. When the switch is released, the outboard motor will stop in its current position. For instructions on using the power trim and tilt switch, see page 58.

EWM01032

Use the power trim and tilt switch located on the bottom cowling only when the boat is at a complete stop with the engine off. Attempting to use this switch while the boat is moving could increase the risk of falling overboard and could distract the

Page 31

operator, increasing the risk of collision

ZMU03096

ZMU03097

ZMU03098

with another boat or an obstacle.

Components

1. Trim tab

2. Bolt

EMU26246

Trim tab with anode

EWM00841

An improperly adjusted trim tab could cause difficult steering. Always test run after the trim tab has been installed or replaced to be sure steering is correct. Be sure you have tightened the bolt after adjusting the trim tab.

The trim tab should be adjusted so that the steering control can be turned to either the right or left by applying the same amount of force. If the boat tends to veer to the left (port side), turn the trim tab rear end to the port side “A” in the figure. If the boat tends to veer to the right (starboard side), turn the trim tab end to the starboard side “B” in the figure.

ECM00841

The trim tab also serves as an anode to protect the engine from electrochemical corrosion. Never paint the trim tab as it will become ineffective as an anode.

Bolt tightening torque:

18 N·m (1.8 kgf·m, 13 lb·ft)

EMU26263

Trim rod (tilt pin)

The position of the trim rod determines the minimum trim angle of the outboard motor in relation to the transom.

EMU30531

Tilt lock mechanism

The tilt lock mechanism is used to prevent the outboard motor from lifting out of the water when in reverse gear.

Page 32

Components

ZMU06790

ZMU03194

ZMU03358

1. Tilt lock lever

To lock it, set the tilt lock lever in the lock position. To release, push the tilt lock lever in the release position.

EMU30202

Tilt support lever for manual tilt model

To keep the outboard motor in the tilted up position, lock the tilt support lever to the clamp bracket.

EMU26342

Tilt support lever for power trim and tilt model

To keep the outboard motor in the tilted up position, lock the tilt support lever to the clamp bracket.

ECM00661

Do not use the tilt support lever or knob when trailering the boat. The outboard motor could shake loose from the tilt support and fall. If the motor cannot be trailered in the normal running position, use an additional support device to secure it in the tilt position.

ECM00661

EMU26374

Cowling lock lever(s) (turn type)

To remove the engine top cowling, turn the cowling lock lever(s) and lift off the cowling. When installing the cowling, check to be sure it fits properly in the rubber seal. Then lock the cowling again by returning the cowling lock lever(s) to the lock position.

Page 33

1. Cowling lock lever(s)

ZMU02862

ZMU03361

ZMU03360

EMU26305

Alert indicator

If the engine develops a condition which is cause for alert, the indicator lights up. For details on how to read the alert indicator, see page 32.

Components

1. Alert indicator

1. Alert indicator(s)

Page 34

Instruments and indicators

ZMU03360

ZMU03361

EMU36016

Indicators

EMU26292

Alert indicator for three indicators

If the engine develops a condition which is cause for alert, the indicator on the front of the bottom cowling lights up. The three indicators mounted on the bottom cowling also indicate the engine oil level. For details on how to read the alert indicators, see page 32.

1. Alert indicator(s)

1. Overheat-alert indicator

EMU37561

Oil level-alert indicator

If the oil level falls below the lower limit, this indicator will light up. For further information, see page 32.

ECM00031

Do not operate the engine without oil. Serious engine damage will occur.

EMU36034

Overheat-alert indicator

If the engine temperature rises too high, this indicator will light up. For further information on reading the indicator, see page 32.

ECM00053

Do not continue to run the engine if the overheat-alert indicator is on. Serious engine damage will occur.

ZMU03361

1. Oil level-alert indicator

EMU26494

Digital tachometer

The tachometer shows the engine speed and has the following functions. All segments of the display will light momentarily after the main switch is turned on and will return to normal thereafter.

Page 35

Instruments and indicators

TIP:

ZMU01891

ZMU01869

ZMU01870

1. Tachometer

2. Trim meter

3. Hour meter

4. Oil level indicator

5. Overheat-alert indicator

6. Set button

7. Mode button

The water separator and engine trouble-alert indicators only operate when the engine is equipped with the appropriate functions.

EMU36051

Tachometer

The tachometer displays engine speed in hundreds of revolutions per minute (r/min). For example, if the tachometer display reads “22” then the engine speed is 2200 r/min.

EMU26622

Trim meter

This meter shows the trim angle of your outboard motor.

 Memorize the trim angles that work best

for your boat under different conditions. Adjust the trim angle to the desired using the power trim and tilt switch.

 If the trim angle of your motor exceeds the

trim operating range, the top segment on the trim meter display will blink.

EMU26652

Hour meter

This meter shows the number of hours the engine has been run. It can be set to show the total number of hours or the number of hours for the current trip. The display can also be turned on and off.

To change the display format, press the “ ” (mode) button. The display can show total hours or trip hours, or turn off. To reset the trip hours, simultaneously press the “ ” (set) and “ ” (mode) buttons for more than 1 second while the trip hours are displayed. This resets the trip counter to 0 (zero). The total number of hours the engine has been run cannot be reset.

EMU26552

Oil level indicator (digital type)

This indicator shows the engine oil level. If

Page 36

Instruments and indicators

ZMU01867

ZMU01868

ZMU04577

the oil level falls below the lower limit, the alert indicator will start to blink. For further information, see page 33.

ECM00031

Do not operate the engine without oil. Serious engine damage will occur.

1. Overheat-alert indicator

EMU26472

This gauge shows the engine speed and has the following functions.

1. Oil level indicator

EMU26584

Overheat-alert indicator

If the engine temperature rises too high, the alert indicator will start to blink. For further information on reading the indicator, see page

32.

ECM00053

1. Tachometer

Do not continue to run the engine if the overheat-alert indicator is on. Serious engine damage will occur.

2. Oil level indicator

EMU26542

Oil level indicators (three indicators

The indicators on the gauge show the status of the oil level. For details on how to read the indicators, see page 45.

ECM00031

Analog tachometer

Do not operate the engine without oil. Serious engine damage will occur.

Page 37

Instruments and indicators

ZMU04580

ZMU04581

1. Oil level indicators

EMU26612

Analog trim meter

This gauge shows the trim angle of your outboard motor.

Memorize the trim angles that work best for your boat under different conditions. Adjust the trim angle to the desired setting with the power trim and tilt switch.

Page 38

Engine control system

ZMU04766

ZMU03364 ZMU01757

ZMU03026

EMU26806

Alert system

ECM00093

Do not continue to operate the engine if an alert device has activated. Consult your Yamaha dealer if the problem cannot be located and corrected.

EMU43754

Overheat alert

This engine has an overheat-alert device. If the engine temperature rises too high, the alert device will activate.

 The engine speed will automatically de-

crease to 2000–3500 r/min.

 The buzzer will sound (if equipped on the

tiller handle, remote control box, or main

switch panel).

ZMU03025

 The overheat-alert indicator will light or

blink (if equipped).

If the alert system has activated, stop the engine and check the cooling water inlets:

 Check trim angle to be sure that the cool-

ing water inlet is submerged.

 Check the cooling water inlet for clogging.

Page 39

EMU2684B

TIP:

ZMU04586

ZMU03364

ZMU03363

ZMU03942

ZMU01758

Oil level alert and oil filter clogging alert

Oil injection models

This engine has an oil level alert system. If the oil level falls below the lower limit, the alert system will activate.

Activation of alert device

 Engine speed will automatically decrease

to about 2000–3500 r/min.

Engine control system

 The oil level-alert indicator will light or

blink.

 The buzzer will sound (if equipped on the

tiller handle, remote control box, or main

switch panel).

If the alert system has been activated, stop the engine and check for the cause.

The alert for oil filter clogging is similar to the alerts for low oil level and overheating. To make troubleshooting easier, check for engine overheating first, then oil level, and finally oil filter clogging.

Page 40

Engine control system

ZMU06661

ZMU06662

1. Oil filter

Page 41

EMU26903

ZMU01760

Installation

The information presented in this section is intended as reference only. It is not possible to provide complete instructions for every possible boat and motor combination. Proper mounting depends in part on experience and the specific boat and motor combination.

EWM01591

Installation

 Overpowering a boat could cause se-

vere instability. Do not install an outboard motor with more horsepower than the maximum rating on the capacity plate of the boat. If the boat does not have a capacity plate, consult the boat manufacturer.

 Improper mounting of the outboard mo-

tor could result in hazardous conditions such as poor handling, loss of control, or fire hazards. For permanently mounted models, your dealer or other person experienced in proper rigging should mount the motor.

EMU33471

Mounting the outboard motor

The outboard motor should be mounted so that the boat is well balanced. Otherwise, the boat could be hard to steer. For single-engine boats, mount the outboard motor on the centerline (keel line) of the boat.

1. Center line (keel line)

EMU26937

Mounting height (boat bottom)

The mounting height of your outboard motor affects its efficiency and reliability. If it is mounted too high, propeller ventilation may occur, which will reduce propulsion due to excessive propeller slip, and the water intakes for the cooling system may not get an adequate water supply, which can cause engine overheating. If the engine is mounted too low, water resistance (drag) will increase, thereby reducing engine efficiency and performance. Most commonly, an outboard motor should be mounted so that the anti-cavitation plate is in alignment with the bottom of the boat. The optimum mounting height of the outboard motor is affected by the boat/motor combination and the desired use. Test runs at different heights can help determine the optimum mounting height. Consult your Yamaha dealer or boat manufacturer for further information on determining the proper mounting height.

Page 42

Installation

ZMU01762

ZMU02012

ZMU02013

ECM01635

 Make sure that the idle hole is high

enough to prevent water from entering the engine even if the boat is stationary with the maximum load.

 Incorrect engine height or obstructions

to the smooth flow of water (such as the design or condition of the boat, or accessories, such as transom ladders or depth finder transducers) can create airborne water spray while the boat is cruising. If the outboard motor is operated continuously in the presence of airborne water spray, enough water could enter the engine through the air intake opening in the top cowling to cause severe engine damage. Remove the cause of the airborne water spray.

could allow the outboard motor to fall off or move on the transom. This could cause loss of control and serious injury. Make sure the clamp screws are tightened securely. Occasionally check the screws for tightness during operation.

[EWM00643]

(2) If the restraint cable attachment is

equipped on your engine, a restraint cable or chain should be used. Attach one end to the restraint cable attachment and the other to a secure mounting point on the boat. Otherwise the engine could be completely lost if it accidentally falls off the transom.

EMU26974

Clamping the outboard motor

(1) Place the outboard motor on the tran-

som so that it is positioned as close to the center as possible. Tighten the transom clamp screws evenly and securely. Occasionally check the clamp screws for tightness during operation of the outboard motor because they could become loose due to engine vibration.

WARNING! Loose clamp screws

(3) Secure the clamp bracket to the transom

using the bolts provided with the outboard (if packed). For details, consult your Yamaha dealer. WARNING! Avoid

using bolts, nuts or washers other than those contained in the engine

Page 43

packaging. If used, they must be of at

ZMU03185

least the same quality of material and strength and must be tightened securely. After tightening, test run the engine and check their tightness.

[EWM00652]

1. Bolts

Installation

Page 44

Operation

EMU36382

First-time operation

EMU27023

Breaking in engine

Your new engine requires a period of breakin to allow mating surfaces of moving parts to wear in evenly. Correct break-in will help ensure proper performance and longer engine life.

ECM00142

 Failure to follow the break-in procedure

could result in reduced engine life or even severe engine damage.

 Premixed fuel must be used during

break-in.

EMU27061

Gasoline and engine oil mixing chart (50:1)

speed. A fast idle in neutral is best.

(2) Next 50 minutes:

Do not exceed half throttle (approximately 3000 r/min). Vary engine speed occasionally. If you have an easy-planing boat, accelerate at full throttle onto plane, then immediately reduce the throttle to 3000 r/min or less.

(3) Next two hours:

Accelerate at full throttle onto plane, then reduce engine speed to three-quarter throttle (approximately 4000 r/min). Vary engine speed occasionally. Run at full throttle for one minute, then allow about 10 minutes of operation at threequarter throttle or less to let the engine cool.

(4) Remaining seven hours:

Run the engine at any speed. However, avoid operating at full throttle for more than 5 minutes at a time.

(5) After the first 10 hours:

Operate the engine normally. Use only straight gasoline in the fuel tank. The Yamaha oil injection system provides proper lubrication for normal operation.

1. : Gasoline

2. : Engine oil

ECM00151

Be sure to mix gasoline and oil completely, otherwise the engine may be damaged.

EMU30312

Procedure for oil injection models

Run the engine under load (in gear with a propeller installed) for 10 hours as follows. (1) First 10 minutes:

Run the engine at the lowest possible

EMU36402

Getting to know your boat

All boats have unique handling characteristics. Operate cautiously while you learn how your boat handles under different conditions and various trim angles (see page 55).

EMU36414

Checks before starting engine

EWM01922

If any item in “Checks before starting engine” is not working properly, have it inspected and repaired before operating the outboard motor. Otherwise, an acci-

Page 45

Operation

ZMU06084

ZMU06150

dent could occur.

ECM00121

Do not start the engine out of water. Overheating and serious engine damage can occur.

EMU37142

Fuel level

Be sure you have plenty of fuel for your trip. A good rule is to use 1/3 of your fuel to get to the destination, 1/3 to return, and to keep 1/3 as an emergency reserve. With the boat level on a trailer or in the water, check the fuel level. For fuel filling instructions, see page

42.

EMU36573

Remove the top cowling

For the following checks, remove the top cowling from the bottom cowling. To remove the top cowling, release the cowling lock lever and lift off the top cowling.

es of ignition.

EWM00911

Leaking fuel can result in fire or explosion.

 Check for fuel leakage regularly.  If any fuel leakage is found, the fuel

system must be repaired by a qualified

mechanic. Improper repairs can make

the outboard unsafe to operate.

EMU36453

Check for fuel leaks

 Check for fuel leaks or gasoline fumes in

the boat.

 Check for fuel leakage from the fuel sys-

tem.

 Check the fuel tank and fuel lines for

cracks, swellings, or other damage.

EMU37323

Checking the fuel filter

Check that the fuel filter is clean and free of water. If any water is found in the fuel, or if a significant amount of debris is found, the fuel tank should be checked and cleaned by a Yamaha dealer.

EMU36443

Fuel system

EWM00061

Gasoline and its vapors are highly flammable and explosive. Keep away from sparks, cigarettes, flames, or other sourc-

EMU36903

Controls

Tiller handle models:

 Move the tiller handle fully to the left and

right to make sure operation is smooth.

Page 46

Operation

ZMU03367

 Turn the throttle grip from the fully closed

to the fully open position. Make sure that it turns smoothly and that it completely returns to the fully closed position.

 Look for loose or damaged connections of

the throttle and shift cables.

Remote control models:

 Turn the steering wheel full-right and full-

left. Make sure operation is smooth and unrestricted throughout the whole range with no binding or excessive free play.

 Operate the throttle levers several times to

make sure there is no hesitation in their travel. Operation should be smooth over the complete range of motion, and each lever should return completely to the idle position.

 Look for loose or damaged connections of

the throttle and shift cables.

EMU36484

Engine shut-off cord (lanyard)

Inspect the engine shut-off cord and clip for damage, such as cuts, breaks, and wear.

EMU27154

Engine

 Check the engine and engine mounting.  Look for loose or damaged fasteners.  Check the propeller for damage.  Check for engine oil leaks.

EMU27182

Operation after long period of storage

Oil injection models

When operating the engine after a long period (12 months) of storage, proceed as follows: (1) Use a 50:1 gasoline to oil mixture to start

the engine.

(2) Start the engine. Leave it idling.

WARNING! Do not touch or remove electrical parts when starting or during operation. Keep hands, hair, and clothes away from the flywheel and other rotating parts while the engine is running.

(3) Watch for oil flowing through the oil feed

pipes. After any air in the oil lines has been expelled, the oil injection system should supply oil normally. If no oil is flowing after 10 minutes of idling, consult your Yamaha dealer.

[EWM01332]

1. Clip

2. Engine shut-off cord (lanyard)

EMU27121

Oil

 Check to be sure you have plenty of oil for

your trip.

ECM01261

Be sure to take the above steps when op-

Page 47

erating the engine after a long period of

ZMU06109

ZMU04678

storage. Otherwise engine seizure could occur.

EMU36956

Install top cowling

(1) Be sure that the cowling lock lever is re-

leased.

(2) Be sure that the rubber seal is seated all

the way around the top cowling.

(3) Place the top cowling on the bottom

cowling.

(4) Check to be sure the rubber seal is seat-

ed correctly between the top cowling and the bottom cowling.

(5) Move the cowling lock lever to lock the

top cowling as shown. NOTICE: If the

top cowling is not installed correctly, water spray under the top cowling can damage the engine, or the top cowling can blow off at high speeds.

[ECM01992]

Operation

EMU34582

Power trim and tilt system

EWM01931

 Never get under the lower unit while it

is tilted, even when the tilt support lever

is locked. Severe injury could occur if

the outboard motor accidentally falls.

 Body parts can be crushed between the

motor and the clamp bracket when the

motor is trimmed or tilted.

 Be sure no one is near the outboard

motor before performing this check.

After installing, check the fitting of the top cowling by pushing it with both hands. If the top cowling is loose, have it repaired by your Yamaha dealer.

(1) Check the power trim and tilt unit for any

sign of oil leaks.

ZMU07311

1. Trim and tilt rod

(2) Operate each of the power trim and tilt

switches to check that all switches work.

(3) Tilt the outboard motor up and check

Page 48

Operation

ZMU06621

ZMU02301

that the trim and tilt rod is pushed out completely.

(4) Check that the trim and tilt rod is free of

corrosion or other flaws.

(5) Tilt the outboard motor down. Check that

the trim and tilt rod operates smoothly.

EMU36585

Battery

Check the battery’s charge. If your boat is equipped with a Yamaha digital speedometer, the voltmeter and low battery alert functions will help you monitor the battery’s charge. A battery in good condition will provide a minimum of 12 volts. Check that the battery connections are clean, secure and covered by insulating covers. The electrical connections of the battery and cables must be clean and properly connected or the battery will not start the engine. If the battery needs charging, consult your Yamaha dealer or the battery manufacturer’s instructions.

EMU27235

Filling fuel and engine oil

on your skin, wash with soap and wa-

ter. If gasoline spills on your clothing,

change your clothes.

(1) Be sure the engine is stopped. (2) Disconnect the fuel line from the fuel

tank and tighten the air vent screw on the fuel tank cap.

EMU2724A

Filling fuel for portable tank

EWM01831

 Gasoline and its vapors are highly flam-

mable and explosive. Always refuel according to this procedure to reduce the risk of fire and explosion.

 Gasoline is poisonous and can cause

injury or death. Handle gasoline with care. Never siphon gasoline by mouth. If you should swallow some gasoline or inhale a lot of gasoline vapor, or get some gasoline in your eyes, see your doctor immediately. If gasoline spills

(3) Remove the portable tank from the boat. (4) Be sure you are in a well-ventilated out-

door area, either securely moored or trailered.

(5) Do not smoke and keep away from

sparks, flames, static electric discharge, or other sources of ignition.

(6) If you use a portable container to store

and dispense fuel, use only an approved GASOLINE container.

(7) Touch the fuel nozzle to the filler open-

ing or funnel to help prevent electrostatic sparks.

Page 49

Operation

ZMU02834

(8) Fill the fuel tank, but do not overfill.

WARNING! Do not overfill. Otherwise fuel can expand and overflow if the temperature increases.

[EWM02611]

Fuel tank capacity:

24 L (6.34 US gal, 5.28 Imp.gal)

(9) Tighten the filler cap securely. (10)Wipe up any spilled gasoline immediate-

ly with dry rags. Dispose of rags properly according to local laws or regulations.

EMU27302

Filling oil for manual starter model

EWM00531

(1) Remove the top cowling. (2) Open the oil tank filler cap by pulling the

tab.

(3) Slowly fill the engine oil into the engine

oil tank.

ZMU03368

1. Engine oil tank

2. Oil tank filler cap

(4) After filling, replace the cap securely.

EMU27312

Filling oil for electric start models

EWM00531

Do not add gasoline into the oil tank. Fire or explosion could result.

This engine uses the Yamaha oil injection system, which provides superior lubrication by ensuring the proper oil ratio for all operating conditions. No fuel premixing is needed. Simply pour gasoline into the fuel tank and oil into the oil tank. Convenient indicator segments indicate the status of the oil supply. For details on reading the indicator segments, see page 45. To fill the engine oil tank, proceed as follows:

Engine oil tank capacity:

1.5 L (1.59 US qt, 1.32 Imp.qt)

Engine oil tank capacity:

1.5 L (1.59 US qt, 1.32 Imp.qt)

(1) Turn the oil filler access cap on the top

cowling counterclockwise and open it.

Page 50

Operation

ZMU03369

ZMU03370

(2) Open the oil tank filler cap by pulling the

tab on the cap.

(3) Slowly pour the engine oil into the en-

gine oil tank.

1. Oil filler access cap

2. Oil tank filler cap

(4) After filling, replace the all caps secure-

ly.

ZMU03371

Page 51

EMU27322

Oil level indicator operation

The various functions of the oil level system are as follows:

EMU27343

Manual start models

Oil level-alert indicator Engine oil tank Remarks

more than

OFF

Red

Electric start models

Oil level-alert

indicator

(digital

tachometer)

Oil level-alert

tachometer/

bottom cowling)

indicator

(analog

Green

200 cm (0.21 US qt,

0.181 Imp qt)

200 cm (0.21 US qt,

0.181 Imp qt) or less

Engine oil tank Remarks

more than 450

(0.48 US qt,

0.40 Imp qt)

Operation

No refilling necessary.

 Buzzer sounds in

remote control box and engine speed is limited to about 2000 r/min to help conserve oil.

 Check oil filter for

clogging.

 Add oil; see page

43.

No refilling necessary.

Red

Yellow

from 450 cm (0.48 US qt, 0.40 Imp qt) down to

(0.21

200 cm US qt, 0.18 Imp qt)

(0.21

200 cm US qt, 0.18 Imp qt) or less

Add oil; see page 43.

 Buzzer sounds in

remote control box and engine speed is limited to about 2000 r/min to help conserve oil.

 Check oil filter for

clogging.

Page 52

Operation

TIP:

ZMU02295

ZMU03100

ZMU02024

EMU27453

Operating engine

EWM00421

 Before starting the engine, make sure

that the boat is tightly moored and that you can steer clear of any obstructions. Be sure there are no swimmers in the water near you.

 When the air vent screw is loosened,

gasoline vapor will be released. Gasoline is highly flammable, and its vapors are flammable and explosive. Refrain from smoking, and keep away from open flames and sparks while loosening the air vent screw.

 This product emits exhaust gases

which contain carbon monoxide, a colorless, odorless gas which could cause brain damage or death when inhaled. Symptoms include nausea, dizziness, and drowsiness. Keep cockpit and cabin areas well ventilated. Avoid blocking exhaust outlets.

joint on the motor and firmly connect the fuel line to the joint while pinching the joint. Then firmly connect the other end of the fuel line to the joint on the fuel tank.

EMU35706

Sending fuel (portable tank)

(1) If there is an air vent screw on the fuel

tank cap, loosen it 2 or 3 turns.

(2) If there is a fuel joint on the motor, align

the fuel joint on the fuel line with the fuel

Wipe up any spilled gasoline immediately with dry rags. Dispose rags properly according to local laws or regulations. (3) If a steering friction adjuster is provided

on your outboard motor, securely attach the fuel line to the fuel line clamp.

(4) Squeeze the primer pump, with the ar-

row pointing up, until you feel it become firm. During engine operation place the tank horizontally, otherwise fuel cannot be drawn from the fuel tank.

Page 53

TIP:

1. Arrow

ZMU07329

Operation

(1) Place the gear shift lever in neutral.

EMU27495

Starting engine

EWM01601

Before starting the engine, make sure that the boat is tightly moored and that you can steer clear of any obstructions. Be sure there are no swimmers in the water near you.

EMU2750A

Manual start models (tiller control)

EWM01842

 Failure to attach the engine shut-off

cord could result in a runaway boat if operator is ejected. Attach the engine shut-off cord to a secure place on your clothing, or your arm or leg while operating. Do not attach the cord to clothing that could tear loose. Do not route the cord where it could become entangled, preventing it from functioning.

 Avoid accidentally pulling the cord dur-

ing normal operation. Loss of engine power means the loss of most steering control. Also, without engine power, the boat could slow rapidly. This could cause people and objects in the boat to be thrown forward.

The start-in-gear protection device prevents the engine from starting except when in neutral. (2) Attach the engine shut-off cord to a se-

cure place on your clothing, or your arm or leg. Then install the clip on the other end of the cord into the engine shut-off switch.

(3) Place the throttle grip in the “ ”

(start) position.

Page 54

Operation

TIP:

ZMU03389

ZMU03279

(4) Pull out / turn the choke knob fully. After

the engine starts, replace / return the knob to the home position.

 It is not necessary to use the choke when

starting a warm engine.

 If the choke knob is left in the “ ”

(start) position while the engine is running, the engine will run poorly or stall.

(5) Pull the manual starter handle slowly un-

til you feel resistance. Then give a strong pull straight out to crank and start the engine. Repeat if necessary.

(6) After the engine starts, slowly return the

manual starter handle to its original position before releasing it.

(7) Slowly return the throttle grip to the fully

closed position.

 When the engine is cold, it needs to be

warmed up. For further information, see

page 51.

 If the engine does not start on the first try,

repeat the procedure. If the engine fails to

start after 4 or 5 tries, open the throttle a

small amount (between 1/8 and 1/4) and

try again. Also if the engine is warm and

fails to start, open the throttle a same

amount and try to start the engine again. If

the engine still fails to start, see page 80.

Page 55

EMU27597

TIP:

Electric start / prime start models

EWM01842

 Failure to attach the engine shut-off

 Avoid accidentally pulling the cord dur-

(1) Place the gear shift lever in neutral.

Operation

(3) Place the throttle grip in the “ ”

(start) position. After the engine starts, return the throttle to the fully closed position.

The start-in-gear protection device prevents the engine from starting except when in neutral. (2) Attach the engine shut-off cord to a se-

cure place on your clothing, or your arm or leg. Then install the clip on the other end of the cord into the engine shut-off switch.

(4) Turn the main switch to “ ” (start),

and hold it for a maximum of 5 seconds.

(5) Immediately after the engine starts, re-

lease the main switch and allow it to return to “ ” (on). NOTICE: Never turn

the main switch to “ ” (start) while the engine is running. Do not

Page 56

Operation

TIP:

ZMU01771

keep the starter motor turning for more than 5 seconds. If the starter motor is turned continuously for more than 5 seconds, the battery will be quickly discharged, thus making it impossible to start the engine. The starter can also be damaged. If the engine will not start after 5 seconds of cranking, return the main switch to “ ” (on), wait 10 seconds, then crank the engine again.

 When the engine is cold, it needs to be

warmed up. For further information, see page 51.

 If the engine is warm and fails to start,

open the throttle slightly and try to start the engine again. If the engine still fails to start, see page 80.

EMU27666

Electric start and remote control models

EWM01842

[ECM00193]

The start-in-gear protection device prevents the engine from starting except when in neutral. (2) Attach the engine shut-off cord to a se-

cure place on your clothing, or your arm or leg. Then install the clip on the other end of the cord into the engine shut-off switch.

 Failure to attach the engine shut-off

 Avoid accidentally pulling the cord dur-

(1) Place the remote control lever in neutral.

ZMU01772

(3) Turn the main switch to “ ” (on). (4) Turn the main switch to “ ” (start),

and hold it for a maximum of 5 seconds.

Page 57

(5) Immediately after the engine starts, re-

TIP:

START

ZMU01774

ZMU03391

lease the main switch and allow it to return to “ ” (on). NOTICE: Never turn

the main switch to “ ” (start) while the engine is running. Do not keep the starter motor turning for more than 5 seconds. If the starter motor is turned continuously for more than 5 seconds, the battery will be quickly discharged, thus making it impossible to start the engine. The starter can also be damaged. If the engine will not start after 5 seconds of cranking, return the main switch to “ ” (on), wait 10 seconds, then crank the engine again.

[ECM00193]

Operation

cooling water pilot hole. A continuous flow of water from the pilot hole indicates that the water pump is pumping water through the cooling water passages. If the cooling water passages are frozen, it may take a while for water to start flowing out of the pilot hole.

ECM01811

If water is not flowing out of the pilot hole at all times while the engine is running, overheating and serious damage could occur. Stop the engine and check whether the cooling water inlet on the lower case or the cooling water pilot hole is blocked. Consult your Yamaha dealer if the problem cannot be located and corrected.

 When the engine is cold, it needs to be

warmed up. For further information, see page 51.

 If the engine is warm and fails to start,

open the throttle slightly and try to start the engine again. If the engine still fails to start, see page 80.

EMU36511

Checks after starting engine

EMU36524

Cooling water

Check for a steady flow of water from the

EMU27671

Warming up engine

EMU27685

Choke start models

After starting the engine, allow it to idle for 3 minutes to warm up. NOTICE: Failure to do

so will shorten engine life.

ly return the choke knob to its home position as the engine warms up.

[ECM04550] Gradual-

Page 58

Operation

ZMU03399

EMU27705

Electric start and prime start models

After starting the engine, allow it to idle for 3 minutes to warm up. Failure to do so will shorten engine life.

EMU36532

Checks after engine warm up

EMU36542

Shifting

While the boat is tightly moored, and without applying throttle, confirm that the engine shifts smoothly into forward and reverse, and back to neutral.

EMU40461

Stop switches

Perform the following procedure to check that the main switch and engine shut-off switch operate properly.

 Check that the engine stops when the

main switch is turned to the “ ” (off) position.

 Check that the engine stops when the clip

is pulled from the engine shut-off switch.

 Check that the engine cannot be started

with the clip removed from the engine shut-off switch.

idle speed can prevent you from shifting back to neutral. If this occurs, stop the engine, shift to neutral, then restart the engine and allow it to warm up.

To shift out of neutral (1) Pull the neutral interlock trigger up (if

equipped).

ZMU01727

1. Neutral interlock trigger

(2) Move the remote control lever / gear

shift lever firmly and crisply forward (for forward gear) or backward (for reverse gear) [about 35 (a detent can felt) for remote control models]. Be sure to check that the tilt lock lever is in the lock/down position (if equipped) before operating in reverse.

EMU34531

Shifting

EWM00181

Before shifting, make sure there are no swimmers or obstacles in the water near you.

ECM01611

Warm up the engine before shifting into gear. Until the engine is warm, the idle speed may be higher than normal. High

Page 59

To shift from in gear (forward/reverse) to

32˚

ZMU05460

ZMU05462

ZMU01771

neutral (1) Close the throttle so that the engine

slows to idle speed.

Operation

(2) After the engine is at idle speed in gear

move the remote control lever / gear shift lever firmly and crisply into the neutral position.

EMU31743

Stopping boat

EWM01511

 Do not use the reverse function to slow

down or stop the boat as it could cause

Page 60

Operation

ZMU03108

you to lose control, be ejected, or impact the steering wheel or other parts of the boat. This could increase the risk of serious injury. It could also damage the shift mechanism.

 Do not shift into reverse while traveling

at planing speeds. Loss of control, boat swamping, or damage to the boat could occur.

The boat is not equipped with a separate braking system. Water resistance stops it after the throttle lever is moved back to idle. The stopping distance varies depending on gross weight, water surface conditions, and wind direction.

EMU27822

Stopping engine

Before stopping the engine, first let it cool off for a few minutes at idle or low speed. Stopping the engine immediately after operating at high speed is not recommended.

EMU2784A

Procedure

(1) Push and hold the engine stop button or

turn the main switch to “ ” (off).

(2) After stopping the engine, disconnect

the fuel line if there is a fuel joint on the outboard motor.

OFF

(3) Tighten the air vent screw on the fuel

tank cap (if equipped).

ZMU01779

Page 61

(4) Remove the key if the boat will be left un-

TIP:

ZMU02301

attended.

The engine can also be stopped by pulling the cord and removing the clip from the engine shut-off switch, then turning the main switch to “ ” (off).

EMU27865

Trimming outboard motor

EWM00741

Operation

ZMU03109

1. Trim operating angle

Excessive trim for the operating conditions (either trim up or trim down) can cause boat instability and can make steering the boat more difficult. This increases the possibility of an accident. If the boat begins to feel unstable or is hard to steer, slow down and/or readjust the trim angle.

The trim angle of the outboard motor helps determine the position of the bow of the boat in the water. Correct trim angle will help improve performance and fuel economy while reducing strain on the engine. Correct trim angle depends upon the combination of boat, engine, and propeller. Correct trim is also affected by variables such as the load in the boat, sea conditions, and running speed.

EMU27873

Adjusting trim angle for manual tilt models

There are 4 or 5 holes provided in the clamp bracket to adjust the outboard motor trim angle. (1) Stop the engine. (2) Tilt the outboard motor up, and then re-

move the trim rod from the clamp bracket.

Page 62

Operation

TIP:

111

ZMU01781

1. Trim rod

(3) Reposition the rod in the desired hole. To raise the bow (“trim-out”), move the rod away from the transom. To lower the bow (“trim-in”), move the rod toward the transom. Make test runs with the trim set to different angles to find the position that works best for your boat and operating conditions.

EWM00401

 Stop the engine before adjusting the

trim angle.

 Use care to avoid being pinched when

removing or installing the rod.

 Use caution when trying a trim position

for the first time. Increase speed gradually and watch for any signs of instability or control problems. Improper trim angle can cause loss of control.

EMU27889

Adjusting trim angle (Power trim and tilt)

EWM00754

 Be sure all people are clear of the out-

board motor when adjusting the trim

angle. Body parts can be crushed be-

tween the motor and the clamp bracket

when the motor is trimmed or tilted.

 Use caution when trying a trim position

for the first time. Increase speed gradu-

ally and watch for any signs of instabil-

ity or control problems. Improper trim

angle can cause loss of control.

 If equipped with a power trim and tilt

switch located on the bottom cowling,

use the switch only when the boat is at

a complete stop with the engine off. Do

not adjust the trim angle with this

switch while the boat is moving.

Adjust the outboard motor trim angle using the power trim and tilt switch.

The outboard motor trim angle can be changed approximately 4 degrees by shifting the trim rod one hole.

1. Power trim and tilt switch

Page 63

TIP:

1. Power trim and tilt switch

To raise the bow (trim-out), press the switch “ ” (up). To lower the bow (trim-in), press the switch “ ” (down). Make test runs with the trim set to different angles to find the position that works best for your boat and operating conditions.

EMU27913

Adjusting boat trim

When the boat is on plane, a bow-up attitude results in less drag, greater stability and efficiency. This is generally when the keel line of the boat is up about 3 to 5 degrees. With the bow up, the boat may have a greater tendency to steer to one side or the other. Compensate for this as you steer. When the bow of the boat is down, it is easier to accelerate from a standing start onto plane.

Operation

Bow Up

Too much trim-out puts the bow of the boat too high in the water. Performance and economy are decreased because the hull of the boat is pushing the water and there is more air drag. Excessive trim-out can also cause the propeller to ventilate, which reduces performance further, and the boat may “porpoise” (hop in the water), which could throw the operator and passengers overboard.

Bow Down

Too much trim-in causes the boat to “plow” through the water, decreasing fuel economy and making it hard to increase speed. Operating with excessive trim-in at higher speeds also makes the boat unstable. Resistance at the bow is greatly increased, heightening the danger of “bow steering” and making operation difficult and dangerous.

Depending on the type of boat, the outboard

Page 64

Operation

ZMU01771

ZMU03405

motor trim angle may have little effect on the trim of the boat when operating.

EMU27936

Tilting up and down

If the engine will be stopped for some time or if the boat is moored in shallows, the outboard motor should be tilted up to protect the propeller and lower casing from damage by collision with obstructions, and also to reduce salt corrosion.

EWM00223

Make sure that no one is near the outboard motor when tilting the outboard motor up or down. Otherwise, body parts could be crushed between the outboard motor and the clamp bracket.

EWM00251

Leaking fuel is a fire hazard. If there is a fuel joint on the outboard motor, disconnect the fuel line or close the fuel cock if the engine will be tilted for more than a few minutes. Otherwise fuel may leak.

ECM00242

shift lever in neutral.

(2) Place the tilt lock lever in the release po-

sition.

 Before tilting the outboard motor, stop

the engine by following the procedure on page 54. Never tilt the outboard motor while the engine is running. Severe damage from overheating can result.

 Do not tilt up the engine by pushing the

tiller handle (if equipped) because this could break the handle.

EMU27956

Procedure for tilting up (manual tilt models)

(1) Place the remote control lever / gear

(3) Hold the rear of the top cowling with one

hand, tilt the engine up, and turn the tilt support lever to the lock position and support the engine. NOTICE: Do not

use the tilt support lever or knob when trailering the boat. The outboard motor could shake loose from the tilt support and fall. If the motor

Page 65

Operation

ZMU03358

ZMU01771

ZMU01935

ZMU04993

cannot be trailered in the normal running position, use an additional support device to secure it in the tilt position. For more detailed information, see page 63.

EMU42693

[ECM01642]

Procedure for tilting up (power trim and tilt models)

(1) Place the remote control lever / gear

shift lever in neutral.

(2) Press the power trim and tilt switch “ ”

(up) until the outboard motor has tilted up completely.

(3) Pull the tilt support lever toward you to

support the engine. WARNING! After

tilting the outboard motor, be sure to support it with the tilt support knob or tilt support lever. Otherwise the outboard motor could fall back down suddenly if oil in the power trim and

Page 66

Operation

ZMU03115

ZMU06644

ZMU02569

tilt unit or in the power tilt unit loses pressure. the tilt support lever or knob when trailering the boat. The outboard motor could shake loose from the tilt support and fall. If the motor cannot be trailered in the normal running position, use an additional support device to secure it in the tilt position. For more detailed information, see page 63.

(4) Once the outboard motor is supported

with the tilt support lever, press the power trim and tilt switch “ ” (down) to retract the trim rods. NOTICE: Make sure

that the trim rods retract completely during mooring. This protects the rods from marine growth and corrosion, which could damage the power trim and tilt mechanism.

EMU30412

Procedure for tilting down (manual tilt models)

(1) Slightly tilt the engine up. (2) On models equipped with a tilt support

lever, return it to the release position.

[EWM00263] NOTICE: Do not use

[ECM01642]

[ECM00254]

(3) Slowly tilt the engine down.

EMU35517

Procedure for tilting down (power trim and tilt models)

(1) Push the power trim and tilt switch “ ”

(up) until the outboard motor is supported by the tilt rod and the tilt support lever becomes free.

(2) Release the tilt support lever.

(3) Push the power trim and tilt switch “ ”

(down) to lower the outboard motor to the desired position.

Page 67

Operation

ZMU01936

ZMU03410

above the surface of the water when setting up for and cruising in shallow water. Otherwise severe damage from overheating can result.

EMU32914

Procedure for power trim and tilt models

(1) Place the remote control lever / gear

shift lever in neutral.

ZMU01771

EMU28063

Shallow water

EMU32852

Power trim and tilt models

The outboard motor can be tilted up partially to allow operation in shallow water.

ECM00261

Do not tilt the outboard motor up so that the cooling water inlet on the lower unit is

(2) Slightly tilt the outboard motor up to the

desired position using the power trim and tilt switch. WARNING! Using the

power trim and tilt switch on the bottom cowling while the boat is moving or engine is on could increase the risk of falling overboard and could distract the operator, increasing the risk of collision with another boat or an obstacle.

[EWM01851]

Page 68

Operation

ZMU01935

(3) To return the outboard motor to the nor-

mal running position, press the power trim and tilt switch and slowly tilt the outboard motor down.

rosion. Also rinse the outside of the outboard motor with fresh water.

EMU28196

Cruising in other conditions

Cruising in salt water

After operating in salt water, flush the cooling water passages with fresh water to prevent them from becoming clogged. Also rinse the outside of the outboard motor with fresh water.

Cruising in muddy, turbid, or acidic water

Yamaha strongly recommends that you use the optional chromium-plated water pump kit (see page 14) if you use the outboard motor in acidic water or water with a lot of sediment in it, such as muddy or turbid (cloudy) water. After operating in such water, flush the cooling passages with fresh water to prevent cor-

Page 69

Maintenance

TIP:

ZMU03122

EMU2822B

Transporting and storing

outboard motor

EWM02621

 USE CARE when transporting fuel tank,

whether in a boat or car.

 DO NOT fill fuel container to maximum

capacity. Gasoline will expand considerably as it warms up and can build up pressure in the fuel container. This can cause fuel leakage and a potential fire hazard.

 Leaking fuel is a fire hazard. When

transporting and storing the outboard motor, disconnect the fuel line from the outboard motor to prevent fuel from leaking.

 Never get under the outboard motor

while it is tilted. Severe injury could occur if the outboard motor accidentally falls.

 Do not use the tilt support lever or knob

when trailering the boat. The outboard motor could shake loose from the tilt support and fall. If the outboard motor cannot be trailered in the normal running position, use an additional support device to secure it in the tilt position.

ECM02441

 Disconnect the fuel line from the outboard

motor.

 Tighten the fuel tank cap and its air vent

screw.

 When the outboard motor is tilted pro-

longed time for mooring or trailering the

boat, disconnect the fuel line from the out-

board motor. Tighten the fuel tank cap and

its air vent screw. The outboard motor should be transported and stored in the normal running position. If there is insufficient road clearance in this position, then trailer the outboard motor in the tilt position using a motor support device such as a transom saver bar. Consult your Yamaha dealer for further details.

EMU28237

Clamp screw mounting models

When transporting or storing the outboard motor while removed from a boat, keep the outboard motor in the attitude shown.

When storing the outboard motor for prolonged time, fuel must be drained from the fuel tank. The deteriorated fuel could clog the fuel line causing engine start difficulty or malfunction.

When storing or transporting the outboard motor, make sure to follow the procedure listed below.

Place a towel or something similar under the outboard motor to protect it from damage.

EMU30273

Storing outboard motor

When storing your Yamaha outboard motor for prolonged periods of time (2 months or longer), several important procedures must be performed to prevent excessive damage.

Page 70

Maintenance

ZMU02051

It is advisable to have your outboard motor serviced by an authorized Yamaha dealer prior to storage. However, you, the owner, with a minimum of tools, can perform the following procedures.

ECM01412

 Do not place the outboard motor on its

side before the cooling water has drained from it completely, otherwise water may enter the cylinder through the exhaust port and cause engine trouble.

 Store the outboard motor in a dry, well-

ventilated place, not in direct sunlight.

EMU28306

Procedure

EMU28336

Flushing in a test tank

ECM00302

Before starting the engine, make sure to supply water to the cooling water passages. Otherwise, the engine could overheat and be damaged.

(1) Wash the outboard motor body using

fresh water. NOTICE: Do not spray wa-

ter into the air intake.

ther information, see page 65.

(2) Disconnect the fuel line from the motor

or shut off the fuel cock, if equipped.

(3) Remove the engine top cowling and si-

lencer cover. Remove the propeller.

(4) Install the outboard motor on the test tank.

Fill the tank with fresh water to above the level of the anti-cavitation plate. NOTICE:

If the fresh water level is below the level of the anti-cavitation plate, or if the water supply is insufficient, engine seizure may occur.

[ECM01841] For fur-

[ECM00292]

1. Water surface

2. Lowest water level

(5) Cooling system flushing is essential to

prevent the cooling system from clogging up with salt, sand, or dirt. In addition, fogging/lubricating of the engine is mandatory to prevent excessive engine damage due to rust. Perform the flushing and fogging at the same time.

WARNING! Do not touch or remove electrical parts when starting or during operation. Keep hands, hair, and clothes away from the flywheel and other rotating parts while the engine is running.

[EWM00092]

(6) Run the engine at a fast idle for a few

minutes in neutral position.

(7) Just prior to turning off the engine, quick-

ly spray “Fogging Oil” alternately into each carburetor or the fogging hole of the silencer cover, if equipped. When properly done, the engine will smoke excessively and almost stall.

(8) Remove the outboard motor from the

test tank.

(9) Install the silencer cover/cap of fogging

hole and top cowling.

(10)If the “Fogging Oil” is not available, run

the engine at a fast idle until the fuel system becomes empty and the engine

Page 71

stops.

TIP:

(11)Drain the cooling water completely out of

the motor. Clean the body thoroughly.

(12)If the “Fogging Oil” is not available, re-

move the spark plug(s). Pour a teaspoonful of clean engine oil into each cylinder. Crank several times manually. Replace the spark plug(s).

(13)Drain the fuel from the fuel tank.

Store the fuel tank in a dry, well-ventilated place, not in direct sunlight.

Maintenance

ZMU07861

1. Air intake

EMU41072

Lubrication

(1) Change the gear oil. For instructions,

see page 75. Check the gear oil for the presence of water that indicates a leaky seal. Seal replacement should be performed by an authorized Yamaha dealer prior to use.

(2) Lubricate all grease fittings. For further

details, see page 70.

For long-term storage, fogging the engine with fogging oil is recommended. Contact your Yamaha dealer for information about fogging oil and procedures for your outboard motor.

EMU44342

Cleaning the outboard motor

When cleaning the outboard motor, the top cowling must be installed. (1) Wash the exterior of the outboard motor

using fresh water. NOTICE: Do not

spray water into the air intake.

[ECM01841]

(2) Drain the cooling water completely out of

the outboard motor. Clean the body thoroughly.

EMU28463

Checking painted surface of outboard motor

Check the outboard motor for scratches, nicks, or flaking paint. Areas with damaged paint are more likely to corrode. If necessary, clean and paint the areas. Touch-up paint is available from your Yamaha dealer.

EMU2847G

Periodic maintenance

EWM01872

These procedures require mechanical skills, tools, and supplies. If you do not have the proper skills, tools, or supplies to perform a maintenance procedure, have a Yamaha dealer or other qualified mechanic do the work. The procedures involve disassembling the motor and exposing dangerous parts. To reduce the risk of injury from moving, hot, or electrical parts:

 Turn off the engine and keep the key(s)

and engine shut-off cord (lanyard) with

Page 72

Maintenance

you when you perform maintenance unless otherwise specified.

 The power trim and tilt switches oper-

ate even when the ignition key is off. Keep people away from the switches whenever working around the motor. When the motor is tilted, keep away from the area under it or between it and the clamp bracket. Be sure no one is in this area before operating the power trim and tilt mechanism.

 Allow the engine to cool before han-

dling hot parts or fluids.

 Always completely reassemble the mo-

tor before operation.

EMU28512

Replacement parts

If replacement parts are necessary, use only genuine Yamaha parts or parts of equivalent design and quality. Any part of inferior quality may malfunction, and the resulting loss of control could endanger the operator and passengers. Yamaha genuine parts and accessories are available from your Yamaha dealer.

 Frequently starting and stopping the en-

gine(s)

 Operation that fluctuates often between

light and heavy cargo loads Outboard motors operating under any of these above conditions require more frequent maintenance. Yamaha recommends that you do this service twice as often as specified in the maintenance chart. For example, if a particular service should be done at 50 hours, do it instead at 25 hours. This will help prevent more rapid deterioration of engine components.

EMU34152

Severe operating conditions

Severe operating conditions involve one or more of the following types of operation on a regular basis:

 Operating continuously at or near maxi-

mum engine speed (rpm) for many hours

 Operating continuously at a low engine

speed (rpm) for many hours

 Operating without sufficient time for engine

to warm up and cool down

 Frequent quick acceleration and decelera-

tion

 Frequent shifting

Page 73

Maintenance

TIP:

EMU34449

Maintenance chart 1

 Refer to the sections in this chapter for explanations of each owner-specific action.  The maintenance cycle on these charts assume usage of 100 hours per year and regular

flushing of the cooling water passages. Maintenance frequency should be adjusted when operating the engine under adverse conditions such as extended trolling.

 Disassembly or repairs may be necessary depending on the outcome of maintenance

checks.

 Expendable or consumable parts and lubricants will lose their effectiveness over time and

through normal usage regardless of the warranty period.

 When operating in salt water, muddy, other turbid (cloudy), acidic water, the engine should

be flushed with clean water after each use. The “ ” symbol indicates the check-ups which you may carry out yourself. The “ ” symbol indicates work to be carried out by your Yamaha dealer.

Initial Every

Item Actions

Anode(s) (external)

Anode(s) (cylinder head, thermostat cover)

Anodes (exhaust cover, cooling water passage cover, Rectifier Regulator cover)

Battery (electrolyte level, terminal)

Cooling water leakage

Cowling lock lever Inspection

Engine starting condition/noise

Engine idle speed/noise

Fuel filter (can be disassembled)

Fuel line Inspection

Fuel line

Inspection or replacement as necessary

Replacement

Inspection

Fill, charging or replacing as necessary

Inspection or replacement as necessary

Inspection

Inspection or replacement as necessary

20 hours

(3 months)

100 hours

(1 year)

300 hours

(3 years)

500 hours

(5 years)

Page 74

Maintenance

Item Actions

Fuel pump

Fuel/engine oil leakage Inspection

Gear oil Replacement

Greasing points Greasing

Impeller/water pump housing

Oil tank water drain Inspection or cleaning

Oil injection pump/oil feed pump

Power trim and tilt unit/Operation, noise and oil leakage

Propeller/propeller nut/cotter pin

Shift link/shift cable

Spark plug(s)

Spark plug caps/spark plug wires

Water from the cooling water pilot hole

Throttle link/throttle cable/throttle pick-up timing

Thermostat

Cooling water inlet Inspection

Main switch/stop switch/choke switch

Wire harness connections/wire coupler connections

(Yamaha) Meter/gauge Inspection

Fuel tank (Yamaha portable tank)

Inspection or replacement as necessary

Replacement

Inspection or Adjustment

Inspection

Inspection or replacement as necessary

Inspection, adjustment or replacement as necessary

Inspection or replacement as necessary

Inspection

Inspection, adjustment or replacement as necessary

Inspection or replacement as necessary

Inspection and cleaning as necessary

Initial Every

20 hours

(3 months)

100 hours

(1 year)

300 hours

(3 years)

500 hours

(5 years)

Page 75

EMU34452

Maintenance chart 2

Maintenance

Item Actions

Exhaust guide/exhaust manifold

Every

1000 hours

Inspection or replacement as necessary

Page 76

Maintenance

ZMU03415

EMU28945

Greasing

Yamaha grease A (water resistant grease) Yamaha grease D (corrosion resistant grease; for propeller shaft)

40VMHO

Page 77

40VEO, 50HETO

ZMU03414

Maintenance

EMU44493

Cleaning and adjusting spark plug

The spark plug is an important engine component and is easy to inspect. The condition of the spark plug can indicate something about the condition of the engine. For example, if the center electrode porcelain is very white, this could indicate an intake air leak or carburetion problem in that cylinder. Do not attempt to diagnose any problems yourself. Instead, take the outboard motor to a Yamaha dealer. You should periodically re-

move and inspect the spark plug because heat and deposits will cause the spark plug to slowly break down and erode. (1) Remove the spark plug caps from the

spark plugs.

(2) Remove the spark plug. If electrode ero-

sion becomes excessive, or if carbon and other deposits are excessive, you should replace the spark plug with another of the correct type. WARNING!

When removing or installing a spark

Page 78

Maintenance

TIP:

ZMU06150

plug, be careful not to damage the insulator. A damaged insulator could allow external sparks, which could lead to explosion or fire.

[EWM00562]

Standard spark plug:

BR7HS-10 (40VEO, 40VMHO) BR8HS-10 (50HETO)

(3) Be sure to use the specified spark plug,

otherwise the engine may not operate properly. Before fitting the spark plug, measure the electrode gap with a wire thickness gauge; replace it if out of specification.

1. Spark plug gap

2. Spark plug part number

3. Spark plug I.D. mark (NGK)

Spark plug gap:

0.9–1.0 mm (0.035–0.039 in)

tight. When you are installing a new spark plug, a good estimate of the correct torque is 1/2 to 2/3 turn past finger-tight.

EMU37451

Checking fuel filter

Check the fuel filter periodically. If any water or foreign matter is found in the filter, clean or replace it. For cleaning or replacement of the fuel filter, consult your Yamaha dealer.

EMU29045

Inspecting idle speed

EWM00452

 Do not touch or remove electrical parts

when starting or during operation.

 Keep hands, hair, and clothes away

from the flywheel and other rotating parts while the engine is running.

ECM00491

(4) When fitting the plug, wipe off any dirt

from the threads, and then screw it in to the correct torque.

Spark plug torque:

25 N·m (2.5 kgf·m, 18 lb·ft)

If a torque-wrench is not available when you are reinstalling a spark plug, a good estimate of the correct torque is 1/12 turn past finger-

This procedure must be performed while the outboard motor is in the water. A flushing attachment or test tank can be used.

If the boat is not equipped with a tachometer for the outboard motor, use a diagnostic tachometer for this procedure. Results may vary depending on whether testing is conducted with the flushing attachment, in a test

Page 79

tank, or with the outboard motor in the water.

ZMU03416

ZMU04989

ZMU03240

(1) Start the engine and allow it to warm up

fully in neutral until it is running smoothly.

(2) Once the engine has warmed up, verify

whether the idle speed is set to specification. For idle speed specifications, see page 10. If you have difficulty verifying the idle speed, or the idle speed requires adjustment, consult a Yamaha dealer or other qualified mechanic.

EMU29062

Checking water in engine oil tank

A translucent water drain hose is connected from the bottom of the oil tank to the filler neck. If water or foreign matter collects in this hose, consult a Yamaha dealer.

Maintenance

1. Drain hose

2. Filler neck side

EMU29116

Inspecting wiring and connectors

 Inspect that each connector is engaged

securely.

 Inspect that each ground lead is properly

secured.

1. Drain hose

2. Filler neck side

EMU32113

Checking propeller

EWM01882

You could be seriously injured if the engine accidentally starts when you are near the propeller. Before inspecting, removing, or installing the propeller, place the shift control in neutral, turn the main switch to “ ” (off) and remove the key, and remove the clip from the engine shutoff switch. Turn off the battery cut-off

Page 80

Maintenance

ZMU01897

switch if your boat has one.

Do not use your hand to hold the propeller when loosening or tightening the propeller nut. Put a wood block between the anti-cavitation plate and the propeller to prevent the propeller from turning.

Checkpoints

 Check each of the propeller blades for ero-

sion from cavitation or ventilation, or other

damage.

 Check the propeller shaft for damage.  Check the splines for wear or damage.  Check for fish line tangled around the pro-

peller shaft.

EMU30663

Removing propeller

EMU29198

Spline models

(1) Straighten the cotter pin and pull it out

using a pair of pliers.

(2) Remove the propeller nut, washer, and

spacer (if equipped). WARNING! Do

not use your hand to hold the propeller when loosening the propeller nut.

[EWM01891]

1. Cotter pin

2. Propeller nut

3. Washer

4. Spacer

5. Propeller

6. Thrust washer

ZMU03131

 Check the propeller shaft oil seal for dam-

age.

(3) Remove the propeller, washer (if

equipped), and thrust washer.

EMU30673

Installing propeller

EMU46121

Spline models

ECM00502

Make sure to use a new cotter pin and bend the ends over securely. Otherwise, the propeller could come off during operation and be lost.

(1) Apply Yamalube Marine Grease or a

corrosion resistant grease to the propel-

Page 81

ler shaft.

TIP:

ZMU08159

(2) Install the spacer (if equipped), thrust

washer, washer (if equipped), and propeller on the propeller shaft. NOTICE:

Make sure to install the thrust washer before installing the propeller. Otherwise, the lower case and propeller boss could be damaged.

[ECM01882]

(3) Install the spacer (if equipped) and the

washer. Tighten the propeller nut to the specified torque.

1. Cotter pin

2. Propeller nut

3. Washer

4. Spacer

5. Propeller

6. Thrust washer

Propeller nut tightening torque:

39 N·m (3.9 kgf·m, 29 lb·ft)

(4) Align the propeller nut slot with the pro-

peller shaft hole. Insert a new cotter pin in the hole and bend the cotter pin ends.

NOTICE: Do not reuse the cotter pin. Otherwise, the propeller can come off during operation.

[ECM01892]

Maintenance

If the propeller nut slot does not align with the propeller shaft hole after tightening the propeller nut to the specified torque, tighten the nut further to align the slot with the hole.

EMU47070

Changing gear oil

EWM00801

 Be sure the outboard motor is securely

fastened to the transom or a stable stand. You could be severely injured if the outboard motor falls on you.

 Never get under the lower unit while it

is tilted, even when the tilt support lever or knob is locked. Severe injury could occur if the outboard motor accidentally falls.

(1) Tilt the outboard motor so that the gear

oil drain screw is at the lowest point possible.

(2) Place a suitable container under the

gear case.

(3) Remove the gear oil drain screw and

gasket. NOTICE: If there is an exces-

sive quantity of metal particles on the magnetic gear oil drain screw, this can indicate lower unit problem. Consult your Yamaha dealer.

[ECM01901]

Page 82

Maintenance

TIP:

ZMU03133

ZMU03132

1. Gear oil drain screw

2. Oil level plug

 If a magnetic gear oil drain screw is

equipped, remove all metal particles from

the screw before installing it.

 Always use new gaskets. Do not reuse the

removed gaskets. (4) Remove the oil level plug and gasket to

allow the oil to drain completely.

NOTICE: Check the used gear oil after it has been drained. If the gear oil is milky or contains water or a large amount of metal particles, the gear case may be damaged. Have a Yamaha dealer check and repair the outboard motor.

For disposal of used oil, consult your Yamaha dealer. (5) Put the outboard motor in a vertical posi-

tion. Using a flexible or pressurized filling device, inject the gear oil into the gear oil drain screw hole.

[ECM00714]

Recommended gear oil:

YAMALUBE outboard gear oil or Hypoid gear oil

Recommended gear oil grade:

SAE 90 API GL-4

Gear oil quantity:

0.430 L (0.455 US qt, 0.378 Imp.qt)

(6) Put a new gasket on the oil level plug.

When the oil begins to flow out of the oil level plug hole, insert and tighten the oil level plug.

Apply a light coat of gear oil to the oil level plug thread and gasket before installation.

Tightening torque:

7 N·m (0.7 kgf·m, 5.2 lb·ft)

(7) Put a new gasket on the gear oil drain

screw. Insert and tighten the gear oil drain screw.

Apply a light coat of gear oil to the gear oil drain screw thread and gasket before installation.

Tightening torque:

7 N·m (0.7 kgf·m, 5.2 lb·ft)

Page 83

Maintenance

ZMU02324

ZMU03134

ZMU03135

EMU29304

Cleaning fuel tank

EWM00921

Gasoline is highly flammable, and its vapors are flammable and explosive.

 If you have any question about properly

doing this procedure, consult your

Yamaha dealer.

 Keep away from sparks, cigarettes,

flames, or other sources of ignition

when cleaning the fuel tank.

 Remove the fuel tank from the boat be-

fore cleaning it. Work only outdoors in

an area with good ventilation.

 Wipe up any spilled fuel immediately.  Reassemble the fuel tank carefully. Im-

proper assembly can result in a fuel

leak, which could result in a fire or ex-

plosion hazard.

 Dispose of old gasoline according to lo-

cal regulations.

(1) Empty the fuel tank into an approved

container.

(2) Pour a small amount of suitable solvent

into the tank. Install the cap and shake the tank. Drain the solvent completely.

(3) Remove the screws holding the fuel joint

assembly. Pull the assembly out of the tank.

suction pipe) in a suitable cleaning solvent. Allow the filter to dry.

(5) Replace the gasket with a new one. Re-

install the fuel joint assembly and tighten the screws firmly.

EMU29318

Inspecting and replacing anode(s)

Yamaha outboard motors are protected from corrosion by sacrificial anodes. Inspect the external anodes periodically. Remove scales from the surfaces of the anodes. Consult a Yamaha dealer for replacement of external anodes.

ECM00721

Do not paint anodes, as this would render them ineffective.

(4) Clean the filter (located on the end of the

Page 84

Maintenance

TIP:

ZMU03418

Inspect ground leads attached to external anodes on equipped models. Consult a Yamaha dealer for inspection and replacement of internal anodes attached to the power unit.

EMU29324

Checking battery (for electric start models)

EWM01903

Battery electrolyte is poisonous and caustic, and batteries generate explosive hydrogen gas. When working near the battery:

 Wear protective eye gear and rubber

gloves.

 Do not smoke or bring any other source

of ignition near the battery.

The procedure for checking the battery varies for different batteries. This procedure contains typical checks that apply to many batteries, but you should always refer to the battery manufacturer’s instructions.

ECM01921

(2) Check the battery’s charge. If your boat

is equipped with the digital speedometer, the voltmeter and low battery alert functions will help you monitor the battery’s charge. If the battery needs charging, consult your Yamaha dealer.

(3) Check the battery connections. They

should be clean, secure, and covered by an insulating cover. WARNING! Bad

connections can produce shorting or arcing and cause an explosion.

[EWM01913]

EMU29335

Connecting the battery

EWM00573

Mount the battery holder securely in a dry, well-ventilated, vibration-free location in the boat. Install a fully charged battery in the holder.

ECM01125

Do not reverse the battery cables. Otherwise, the electrical parts could be damaged.

A poorly maintained battery will quickly deteriorate.

(1) Check the electrolyte level.

(1) Make sure the main switch (on applica-

ble models) is “ ” (off) before working on the battery.

(2) Connect the red battery cable to the

POSITIVE (+) terminal first. Then con-

Page 85

nect the black battery cable to the NEG-

ATIVE (-) terminal.

1. Red cable

2. Black cable

3. Battery

(3) The electrical contacts of the battery and

cables must be clean and properly connected, or the battery will not start the engine.

EMU29372

Disconnecting the battery

(1) Turn off the battery cut-off switch (if

equipped) and main switch. NOTICE: If

they are left on, the electrical system can be damaged.

(2) Disconnect the negative cable(s) from

the negative (-) terminal. NOTICE: Al-

ways disconnect all negative (-) cables first to avoid a short circuit and damage to the electrical system.

[ECM01941]

(3) Disconnect the positive cable(s) and re-

move the battery from the boat.

(4) Clean, maintain, and store the battery

according to the manufacturer’s instructions.

[ECM01931]

Maintenance

Page 86

Trouble Recovery

EMU29428

Troubleshooting

A problem in the fuel, compression, or ignition systems can cause poor starting, loss of power, or other problems. This section describes basic checks and possible remedies, and covers all Yamaha outboard motors. Therefore some items may not apply to your model. If your outboard motor requires repair, bring it to your Yamaha dealer. If the engine trouble-alert indicator is flashing, consult your Yamaha dealer.

Starter will not operate.

Q. Is battery capacity weak or low? A. Check battery condition. Use battery of recommended capacity.

Q. Are battery connections loose or corroded? A. Tighten battery cables and clean battery terminals.

Q. Is fuse for electric start relay or electric circuit blown? A. Check for cause of electric overload and repair. Replace fuse with one of correct amperage.

Q. Are starter components faulty? A. Have serviced by a Yamaha dealer.

Q. Is shift lever in gear? A. Shift to neutral.

Engine will not start (starter operates).

Q. Is fuel tank empty? A. Fill tank with clean, fresh fuel.

Q. Is fuel contaminated or stale?

A. Fill tank with clean, fresh fuel.

Q. Is fuel filter clogged? A. Clean or replace filter.

Q. Is starting procedure incorrect? A. See page 47.

Q. Has fuel pump malfunctioned? A. Have serviced by a Yamaha dealer.

Q. Are spark plug(s) fouled or of incorrect type? A. Inspect spark plug(s). Clean or replace with recommended type.

Q. Are spark plug cap(s) fitted incorrectly? A. Check and re-fit cap(s).

Q. Is ignition wiring damaged or poorly connected? A. Check wires for wear or breaks. Tighten all loose connections. Replace worn or broken wires.

Q. Are ignition parts faulty? A. Have serviced by a Yamaha dealer.

Q. Is engine shut-off cord (lanyard) not attached? A. Attach cord.

Q. Are engine inner parts damaged? A. Have serviced by a Yamaha dealer.

Engine idles irregularly or stalls.

Q. Are spark plug(s) fouled or of incorrect type? A. Inspect spark plug(s). Clean or replace with recommended type.

Page 87

Trouble Recovery

Q. Is fuel system obstructed? A. Check for pinched or kinked fuel line or other obstructions in fuel system.

Q. Is fuel contaminated or stale? A. Fill tank with clean, fresh fuel.

Q. Is fuel filter clogged? A. Clean or replace filter.

Q. Have ignition parts failed? A. Have serviced by a Yamaha dealer.

Q. Has alert system activated? A. Find and correct cause of alert.

Q. Is spark plug gap incorrect? A. Inspect and adjust as specified.

Q. Is ignition wiring damaged or poorly connected? A. Check wires for wear or breaks. Tighten all loose connections. Replace worn or broken wires.

Q. Is specified engine oil not being used? A. Check and replace oil as specified.

A. Return to home position.

Q. Is motor angle too high? A. Return to normal operating position.

Q. Is carburetor clogged? A. Have serviced by a Yamaha dealer.

Q. Is fuel joint connection incorrect? A. Connect correctly.

Q. Is throttle valve adjustment incorrect? A. Have serviced by a Yamaha dealer.

Q. Is battery cable disconnected? A. Connect securely.

Alert buzzer sounds or indicator lights.

Q. Is cooling system clogged? A. Check water intake for restriction.

Q. Is engine oil level low? A. Fill oil tank with specified engine oil.

Q. Is heat range of spark plug incorrect? A. Inspect spark plug and replace it with recommended type.

Q. Is thermostat faulty or clogged? A. Have serviced by a Yamaha dealer.

Q. Are carburetor adjustments incorrect? A. Have serviced by a Yamaha dealer.

Q. Is fuel pump damaged? A. Have serviced by a Yamaha dealer.

Q. Is air vent screw on fuel tank closed? A. Open air vent screw.

Q. Is choke knob pulled out?

Q. Is specified engine oil not being used? A. Check and replace oil with specified type.

Q. Is engine oil contaminated or deteriorated? A. Replace oil with fresh, specified type.

Q. Is oil filter clogged? A. Have serviced by a Yamaha dealer.

Q. Has oil feed/injection pump malfunctioned? A. Have serviced by a Yamaha dealer.

Page 88

Trouble Recovery

Q. Is load on boat improperly distributed? A. Distribute load to place boat on an even plane.

Q. Is water pump or thermostat faulty? A. Have serviced by a Yamaha dealer.

on gear housing? A. Remove foreign matter and clean lower unit.

Q. Is fuel system obstructed? A. Check for pinched or kinked fuel line or other obstructions in fuel system.

Q. Is there excess water in fuel filter cup? A. Drain filter cup.

Engine power loss.

Q. Is propeller damaged? A. Have propeller repaired or replaced.

Q. Is propeller pitch or diameter incorrect? A. Install correct propeller to operate outboard at its recommended speed (r/min) range.

Q. Is trim angle incorrect? A. Adjust trim angle to achieve most efficient operation.

Q. Is motor mounted at incorrect height on transom? A. Have motor adjusted to proper transom height.

Q. Has alert system activated? A. Find and correct cause of alert.

Q. Is boat bottom fouled with marine growth? A. Clean boat bottom.

Q. Is fuel filter clogged? A. Clean or replace filter.

Q. Is fuel contaminated or stale? A. Fill tank with clean, fresh fuel.

Q. Is spark plug gap incorrect? A. Inspect and adjust as specified.

Q. Is ignition wiring damaged or poorly connected? A. Check wires for wear or breaks. Tighten all loose connections. Replace worn or broken wires.

Q. Have electrical parts failed? A. Have serviced by a Yamaha dealer.

Q. Is specified fuel not being used? A. Replace fuel with specified type.

Q. Is specified engine oil not being used? A. Check and replace oil with specified type.

Q. Is thermostat faulty or clogged? A. Have serviced by a Yamaha dealer.

Q. Are spark plug(s) fouled or of incorrect type? A. Inspect spark plug(s). Clean or replace with recommended type.

Q. Are weeds or other foreign matter tangled

Q. Is air vent screw closed? A. Open the air vent screw.

Q. Is fuel pump damaged? A. Have serviced by a Yamaha dealer.

Page 89

Trouble Recovery

Q. Is fuel joint connection incorrect? A. Connect correctly.

Q. Is heat range of spark plug incorrect? A. Inspect spark plug and replace it with recommended type.

Q. Is high pressure fuel pump drive belt broken? A. Have serviced by a Yamaha dealer.

Q. Is engine not responding properly to shift lever position? A. Have serviced by a Yamaha dealer.

Engine vibrates excessively.

Q. Is propeller damaged? A. Have propeller repaired or replaced.

Q. Is propeller shaft damaged? A. Have serviced by a Yamaha dealer.

Q. Are weeds or other foreign matter tangled on propeller? A. Remove and clean propeller.

Q. Is motor mounting bolt loose? A. Tighten bolt.

Q. Is steering pivot loose or damaged? A. Tighten or have serviced by a Yamaha dealer.

EMU29435

Temporary action in

emergency

EMU29442

Impact damage

EWM00871

The outboard motor can be seriously damaged by a collision while operating or trailering. Damage could make the outboard motor unsafe to operate.

If the outboard motor hits an object in t he water, follow the procedure below.

(1) Stop the engine immediately. (2) Check the control system and all compo-

nents for damage. Also, check the boat for damage.

(3) Whether damage is found or not, return

to the nearest harbor slowly and carefully.

(4) Have a Yamaha dealer check the out-

board motor before operating it again.

EMU29464

Replacing fuse

If the fuse has blown on an electric start model, open the fuse holder and replace the fuse with a new one of the proper amperage.

Page 90

Trouble Recovery

ZMU03421

EWM00632

Substituting an incorrect fuse or a piece of wire could allow excessive current flow. This could cause electric system damage and a fire hazard.

ZMU03422

1. Manual valve screw

(2) Put the engine in the desired position,

then tighten the manual valve screw by turning it clockwise.

1. Fuse holder

2. Fuse (20 A)

3. Spare fuse (20 A)

Consult your Yamaha dealer if the new fuse immediately blows again.

EMU29526

Power trim and tilt will not operate

If the engine cannot be tilted up or down with the power trim and tilt because of a discharged battery or a failure with the power trim and tilt unit, the engine can be tilted manually. (1) Loosen the manual valve screw by turn-

ing it counterclockwise until it stops.

EMU29534

Starter will not operate

If the starter mechanism does not operate (the engine cannot be cranked with the starter), the engine can be started with an emergency starter rope.

EWM01023

 Use this procedure only in an emergen-

cy to return to the nearest port for repairs.

 When the emergency starter rope is

used to start the engine, the start-ingear protection device does not operate. Make sure the remote control lever is in neutral. Otherwise the boat could unexpectedly start to move, which could result in an accident.

 Attach the engine shut-off cord to a se-

cure place on your clothing, or your arm or leg while operating the boat.

 Do not attach the cord to clothing that

could tear loose. Do not route the cord where it could become entangled, preventing it from functioning.

Page 91

Trouble Recovery

ZMU03425

ZMU03139

ZMU03140

 Avoid accidentally pulling the cord dur-

ing normal operation. Loss of engine

power means the loss of most steering

control. Also, without engine power,

the boat could slow rapidly. This could

cause people and objects in the boat to

be thrown forward.

 Make sure no one is standing behind

you when pulling the starter rope. It

could whip behind you and injure

someone.

 An unguarded, rotating flywheel is very

dangerous. Keep loose clothing and

other objects away when starting the

engine. Use the emergency starter rope

only as instructed. Do not touch the fly-

wheel or other moving parts when the

engine is running. Do not install the

starter mechanism or top cowling after

the engine is running.

 Do not touch the ignition coil, spark

plug wire, spark plug cap, or other elec-

trical components when starting or op-

erating the motor. You could get an

electrical shock.

(3) Remove the starter/flywheel cover after

removing the bolt(s).

(4) Prepare the engine for starting. For fur-

ther information, see page 47. Be sure the engine is in neutral and that the clip is attached to the engine shut-off switch. The main switch must be “ ” (on), if equipped.

EMU29563

Emergency starting engine

(1) Remove the top cowling. (2) Remove the start-in-gear protection ca-

ble from the starter, if equipped.

Page 92

Trouble Recovery

ON STARTOFF

ZMU01906

ZMU03355

ZMU03429

(5) If equipped the choke knob, pull out it

when the engine is cold. After the engine starts, gradually return the choke knob to its home position as the engine warms up.

(6) Insert the knotted end of the emergency

starter rope into the notch in the flywheel rotor and wind the rope several turns around the flywheel clockwise.

(7) Give a strong pull straight out to crank

and start the engine. Repeat if necessary.

EMU29672

Engine fails to operate

EMU29707

Cold engine fails to start

If the engine fails to start when it is cold, use the following procedure.

EWM00411

When starting or operating the engine, do not touch the ignition coil, spark plug wire, spark plug cap, or other electrical parts carrying high voltage. Keep loose clothing and other objects away from the engine when starting it. Do not touch the flywheel or other moving parts when the engine is running.

(1) Adjust the trim angle so that the drive

shaft is at right angles to the water surface or is trimmed in.

(2) On models equipped with an emergency

starter valve, open it. The valve is located behind the silencer cover on the front of the engine.

Page 93

Trouble Recovery

ZMU03141

OPEN

ZMU03142

ZMU03143

ON STARTOFF

ZMU03144

(3) Squeeze the primer pump two or three

times to feed fuel.

(4) Open the throttle slightly without shifting

using the throttle grip, neutral throttle lever or free accelerator. It is necessary to change the throttle opening slightly depending on the engine temperature. After the engine starts, return the throttle to its original position.

(6) Turn the main switch to “ ” (start).

NOTICE: Never turn the main switch to “ ” (start) while the engine is running. Do not keep the starter motor turning for more than 5 seconds. If the starter motor is turned continuously for more than 5 seconds, the battery will be quickly discharged, thus making it impossible to start the engine. The starter can also be damaged. If the engine will not start after 5 seconds of cranking, return the main switch to “ ” (on), wait 10 seconds, then crank the engine again.

[ECM00193]

OFF

START

ZMU03335

(5) Turn the main switch to “ ” (on).

(7) After the engine starts, close the emer-

gency starter valve (if used), then return the throttle to its original position.

Page 94

Trouble Recovery

TIP:

ZMU03145

OPEN

When the starter mechanism malfunctions, see page 84.

EMU33502

Treatment of submerged motor

If the outboard motor is submerged, immediately take it to a Yamaha dealer. Otherwise some corrosion may begin almost immediately. NOTICE: Do not attempt to run the

outboard motor until it has been completely inspected.

[ECM00402]

Page 95

INDEX

Alcohol and drugs ................................... 2

Alert indicator........................................ 27

Alert indicator for three indicators ......... 28

Alert system .......................................... 32

Analog tachometer................................ 30

Analog trim meter ................................. 31

Anode(s), inspecting and replacing ...... 77

Anti-fouling paint ................................... 14

Avoid collisions ....................................... 3

Battery .................................................. 42

Battery, checking (electric start

models)............................................... 78

Battery, connecting ............................... 78

Battery, disconnecting .......................... 79

Battery requirements ............................ 12

Boat horsepower rating......................... 11

Boating safety ......................................... 2

Boating safety publications ..................... 4

Breaking in engine ................................ 38

Carbon monoxide ................................... 2

CE Marking ............................................. 6

Checks after engine warm up ............... 52

Checks after starting engine ................. 51

Checks before starting engine .............. 38

Choke knob........................................... 22

Clamping the outboard motor ............... 36

Cleaning the outboard motor ................ 65

Cold engine fails to start ....................... 86

Collisions with floating or submerged

objects .................................................. 3

Components diagram ........................... 16

Control functions, checking................... 39

Cooling water........................................ 51

Cowling lock lever................................. 26

Cruising in salt water or other

conditions ........................................... 62

Digital tachometer................................. 28

EC Declaration of Conformity (DoC)....... 5

Electric shock.......................................... 1

Emergency equipment.......................... 15

Emergency starting engine ................... 85

Emergency, temporary action in ........... 83

Engine, checking .................................. 40

Engine fails to operate .......................... 86

Engine oil, checking.............................. 40

Engine oil requirements ........................ 13

Engine oil tank, checking water in ........ 73

Engine shut-off cord (lanyard) .......... 1, 40

Engine shut-off cord (lanyard) and

clip ......................................................21

Engine stop button................................ 22

Filling fuel for portable tank................... 42

Filling oil for electric start models.......... 43

Filling oil for manual starter model........ 43

First-time operation............................... 38

Flushing in a test tank........................... 64

Fuel and engine oil, filling .....................42

Fuel filter, checking......................... 39, 72

Fuel leaks, checking for ........................ 39

Fuel level .............................................. 39

Fuel requirements................................. 13

Fuel system .......................................... 39

Fuel tank ............................................... 18

Fuel tank, cleaning................................ 77

Fuse, replacing .....................................83

Gasoline............................................ 2, 13

Gasoline exposure and spills.................. 2

Gear oil, changing................................. 75

Gear shift lever ..................................... 20

Greasing ...............................................70

Hot parts .................................................1

Hour meter............................................ 29

Page 96

INDEX

Identification numbers record ................. 5

Idle speed, inspecting ........................... 72

Impact damage ..................................... 83

Installation requirements....................... 11

Instruments and indicators.................... 28

Key number ............................................ 5

Laws and regulations.............................. 4

Lubrication ............................................ 65

Main switch ........................................... 23

Maintenance chart 1 ............................. 67

Maintenance chart 2 ............................. 69

Manual starter handle ........................... 22

Modifications........................................... 2

Mounting height .................................... 35

Mounting outboard motor...................... 11

Mounting the outboard motor................ 35

Muddy or acidic water........................... 14

Neutral interlock trigger......................... 20

Neutral throttle lever ............................. 20

Oil level alert and oil filter clogging

alert .................................................... 33

Oil level-alert indicator .......................... 28

Oil level indicator (digital type).............. 29

Oil level indicator operation .................. 45

Oil level indicators................................. 30

Operating engine .................................. 46

Operation after long period of

storage ............................................... 40

Outboard motor disposal

requirements ...................................... 14

Outboard motor (painted surface),

checking ............................................. 65

Outboard motor safety ............................ 1

Outboard motor serial number................ 5

Overheat alert ....................................... 32

Overheat-alert indicator ..................28, 30

Overloading ............................................ 3

Passengers............................................. 2

Passenger training.................................. 4

People in the water ................................. 2

Periodic maintenance ...........................65

Personal flotation devices (PFDs) .......... 2

Power trim and tilt ................................... 1

Power trim and tilt switch (bottom

cowling) .............................................. 24

Power trim and tilt switch (remote

control or tiller handle) ........................ 24

Power trim and tilt system..................... 41

Power trim and tilt will not operate........ 84

Propeller ................................................. 1

Propeller, checking ...............................73

Propeller, installing ............................... 74

Propeller, removing............................... 74

Propeller selection ................................12

Read manuals and labels .......................7

Remote control box............................... 19

Remote control lever............................. 19

Remote control requirements ............... 11

Replacement parts................................ 66

Rotating parts ......................................... 1

Sending fuel (portable tank).................. 46

Severe operating conditions .................66

Shallow water ....................................... 61

Shifting.................................................. 52

Shifting (checks after engine warm

up) ...................................................... 52

Spark plug, cleaning and adjusting....... 71

Specifications........................................ 10

Starter will not operate.......................... 84

Start-in-gear protection ......................... 13

Starting engine...................................... 47

Page 97

Steering friction adjuster ....................... 23

Stopping boat........................................ 53

Stopping engine.................................... 54

Stop switches........................................ 52

Storing outboard motor ......................... 63

Submerged outboard motor.................. 88

Tachometer........................................... 29

Throttle friction adjuster ........................ 21

Throttle grip........................................... 20

Throttle indicator ................................... 21

Tiller handle .......................................... 20

Tilting up and down............................... 58

Tilt lock mechanism .............................. 25

Tilt support lever ................................... 26

Top cowling, installing........................... 41

Top cowling, removing.......................... 39

Transporting and storing outboard

motor .................................................. 63

Trim meter ............................................ 29

Trimming outboard motor ..................... 55

Trim rod (tilt pin).................................... 25

Trim tab with anode .............................. 25

Troubleshooting .................................... 80

INDEX

Warming up engine............................... 51

Warning labels ........................................ 7

Weather .................................................. 4

Wiring and connectors, inspecting........ 73

Yamalube.............................................. 13

Page 98

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