Yamaha F15HP, F20HP User Manual

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Page 1

OWNER’S MANUAL

F15C F20

U.S.A.Edition

LIT-18626-07-17

6AG-28199-10

Page 2

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Read this owner’s manual carefully before operating your outboard motor.

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Important manual information

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To the owner

Thank you for choosing 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.

The Safety Alert Symbol means ATTENTION! BECOME ALERT! YOUR SAFETY IS INVOLVED!

EWM00780

WARNING

Failure to follow WARNING instructions could result in severe injury or death the machine operator, a bystander, or a person inspecting or repairing the outboard motor.

ECM00700

CAUTION:

A CAUTION indicates special precautions that must be taken to avoid damage to the outboard motor.

al, please consult your Yamaha dealer.

NOTE:

The F15CEH, F15CMH, F15CPH, F20EH, F20ER, F20MH, F20PH, F20PR 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.

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F15C, F20

OWNER’S MANUAL

1st edition, June 2006

Any reprinting or unauthorized use

without the written permission of

Yamaha Motor Corporation, USA

is expressly prohibited.

Printed in Japan

P/N LIT-18626-07-17

NOTE:

A NOTE 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 there is any question concerning this manu-

Page 4

General information .......................... 1

Identification numbers record.......... 1

Outboard motor serial number .......... 1

Key number....................................... 1

Emission control information ........... 1

North American models..................... 1

Star labels ......................................... 2

Safety information ........................... 3

Important labels............................... 4

Warning labels ..................................4

Caution labels ...................................5

Basic boating rules (Rules of the

road) .............................................. 5

Steering and sailing rules and

sound signals.................................. 6

Rules when encountering vessels .... 6

Other special situations..................... 7

Fueling instructions ......................... 9

Gasoline.......................................... 10

Engine oil ........................................10

Battery requirement....................... 11

Battery specifications ...................... 11

Without a rectifier or Rectifier

Regulator ...................................... 11

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

Start-in-gear protection ................. 12

Basic components ..........................13

Main components.......................... 13

Fuel tank .........................................13

Fuel joint ......................................... 14

Fuel gauge ...................................... 14

Fuel tank cap .................................. 14

Air vent screw ................................. 14

Remote control................................ 14

Remote control lever....................... 14

Neutral interlock trigger................... 15

Neutral throttle lever........................ 15

Tiller handle .................................... 15

Gear shift lever................................ 15

Throttle grip..................................... 16

Throttle indicator .............................16

Throttle friction adjuster................... 16

Engine stop lanyard switch .............17

Engine stop button .......................... 17

Manual starter handle .....................18

Starter button ..................................18

Main switch .....................................18

Power tilt switch ..............................18

Steering friction adjuster .................19

Steering friction adjuster .................20

Trim tab ...........................................20

Trim rod (tilt pin) ..............................20

Tilt lock mechanism......................... 21

Tilt support knob.............................. 21

Tilt support bar ................................21

Power tilt unit................................... 21

Top cowling lock lever (pull up

type) .............................................. 22

Flushing device ...............................22

Warning indicator ............................22

Warning system ............................ 22

Overheat warning............................ 22

Low oil pressure warning ................23

Operation ......................................... 25

Installation..................................... 25

Mounting the outboard motor ..........25

Clamping the outboard motor.......... 27

Breaking in engine ........................ 28

Procedure for 4-stroke models........ 28

Preoperation checks ..................... 28

Fuel .................................................28

Controls........................................... 28

Engine .............................................28

Checking the engine oil level ..........29

Filling fuel...................................... 29

Ring Free Fuel Additive................... 29

Operating engine .......................... 30

Feeding fuel (portable tank) ............30

Starting engine ................................31

Warming up engine....................... 34

Manual start and electric start

models ..........................................34

Shifting.......................................... 35

Forward (tiller handle and remote

control models) .............................35

Reverse (automatic reverse lock

and power trim and tilt models)..... 36

Reverse (manual tilt and hydro tilt

models) ......................................... 36

Stopping engine............................ 37

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Table of contents

Procedure ....................................... 37

Trimming outboard motor.............. 38

Adjusting trim angle for manual tilt

models .......................................... 38

Adjusting trim angle (power tilt

models) ......................................... 39

Adjusting boat trim ..........................40

Tilting up and down ....................... 41

Procedure for tilting up (manual tilt

models) ......................................... 41

Procedure for tilting up (power trim

and tilt models / power tilt

models) ......................................... 42

Procedure for tilting down (manual

tilt models) .................................... 43

Procedure for tilting down (power

trim and tilt models / power tilt

models) ......................................... 44

Cruising in shallow water .............. 45

Cruising in shallow water (manual

tilt models) .................................... 45

Power trim and tilt models / power

tilt models...................................... 46

Cruising in other conditions........... 47

Maintenance..................................... 48

Specifications ................................ 48

Transporting and storing outboard

motor ........................................... 50

Dismounting the outboard motor..... 50

Storing outboard motor ...................52

Procedure ....................................... 52

Lubrication ...................................... 53

Cleaning and anticorrosion

measures ...................................... 53

Battery care..................................... 53

Flushing power unit......................... 54

Cleaning the outboard motor .......... 55

Checking painted surface of

motor............................................. 55

Periodic maintenance.................... 55

Replacement parts.......................... 56

Maintenance chart .......................... 57

Maintenance chart (additional)........ 58

Greasing ......................................... 59

Cleaning and adjusting spark

plug ............................................... 60

Checking fuel system ......................61

Inspecting fuel filter .........................62

Cleaning fuel filter ...........................62

Inspecting idling speed.................... 63

Changing engine oil ........................63

Checking wiring and connectors .....65

Exhaust leakage.............................. 65

Water leakage .................................66

Engine oil leakage........................... 66

Checking power trim and tilt /

power tilt system ........................... 66

Checking propeller ..........................66

Removing the propeller ...................67

Installing the Propeller..................... 67

Changing gear oil ............................68

Cleaning fuel tank ...........................69

Inspecting and replacing

anode(s)........................................ 69

Checking battery (for electric start

models) ......................................... 70

Connecting the battery ....................71

Disconnecting the battery................ 71

Checking top cowling ......................72

Coating the boat bottom.................. 72

Trouble Recovery............................ 73

Troubleshooting ............................ 73

Temporary action in emergency ... 76

Impact damage ...............................76

Replacing fuse ................................76

Power trim and tilt / power tilt will

not operate.................................... 77

Starter will not operate ....................77

Emergency starting engine

(manual starter model).................. 78

Emergency starting engine

(electric start model) .....................79

Treatment of submerged motor .... 82

Procedure........................................ 82

Consumer information ................... 83

Important warranty information for

U.S.A. and Canada ..................... 83

YAMAHA MOTOR

CORPORATION, U.S.A. FOUR-STROKE OUTBOARD

Page 6

Table of contents

MOTOR THREE-YEAR LIMITED

WARRANTY ................................ 85

IMPORTANT WARRANTY

INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE THE

USA OR CANADA ......................87

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Identification numbers record

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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.

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1. Outboard motor serial number location

General information

1. Key number

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Emission control information

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North American models

This engine conforms to U.S. Environmental Protection Agency (EPA) regulations for marine SI engines. See the label affixed to your engine for details.

EMU25242

Approval label of emission control certificate

This label is attached to the bottom cowling. New Technology; (4-stroke/HPDI) EM

EMU25190

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.

ZMU05516

1. Approval label location

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General information

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Manufactured date label

This label is attached to the clamp bracket or the swivel bracket.

ZMU05498

particular label.

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1. Star labels location

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One Star—Low Emission

The one-star label identifies engines that meet the Air Resources Board’s 2001 exhaust emission standards. Engines meeting these standards have 75% lower emissions than conventional carbureted two-stroke engines. These engines are equivalent to the U.S. EPA’s 2006 standards for marine engines.

1. Manufactured date label location

Manufactured:

ZMU04346

EMU25272

Star labels

Your outboard motor is labeled with a California Air Resources Board (CARB) star label. See below for a description of your

ZMU01702

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Two Stars—Very Low Emission

The two-star label identifies engines that meet the Air Resources Board’s 2004 exhaust emission standards. Engines meeting these standards have 20% lower emissions than One Star-Low-Emission engines.

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Three Stars—Ultra Low Emission

The three-star label identifies engines that meet the Air Resources Board’s 2008 exhaust emission standards. Engines meeting these standards have 65% lower emissions than One Star-Low-Emission engines.

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Safety information

●

Before mounting or operating the outboard motor, read this entire manual. Reading it should give you an understanding of the motor and its operation. Before operating the boat, read any own-

●

er’s or operator’s manuals supplied with it and all labels. Be sure you understand each item before operating. Do not overpower the boat with this out-

●

board motor. Overpowering the boat could result in loss of control. The rated power of

General information

the outboard should be equal to or less than the rated horsepower capacity of the boat. If the rated horsepower capacity of the boat is unknown, consult the dealer or boat manufacturer. Do not modify the outboard. Modifications

●

could make the motor unfit or unsafe to use. Incorrect propeller selection and incorrect

●

use may not only cause engine damage, but also adversely affect fuel consumption. Consult your dealer for correct use.

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Never operate after drinking alcohol or taking drugs. About 50% of all boating fatalities involve intoxication.

●

Have an approved personal flotation device (PFD) on board for every occupant. It is a good idea to wear a PFD whenever boating. At a minimum, children and nonswimmers should always wear PFDs, and everyone should wear PFDs when there are potentially hazardous boating conditions. Gasoline is highly flammable, and its va-

●

pors are flammable and explosive. Handle and store gasoline carefully. Make sure there are no gas fumes or leaking fuel before starting the engine.

●

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. Check throttle, shift, and steering for prop-

●

er operation before starting the engine.

●

Attach the engine stop switch lanyard cord to a secure place on your clothing, or your arm or leg while operating. If you accidentally leave the helm, the cord will pull from

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General information

the switch, stopping the engine.

●

Know the marine laws and regulations where you will be boating—and obey them. For basic boating rules, see “Rules of the road” on page 5. Stay informed about the weather. Check

●

weather forecasts before boating. Avoid boating in hazardous weather. Tell someone where you are going: leave

●

a Float Plan with a responsible person. Be sure to cancel the Float Plan when you return.

●

Use common sense and good judgment when boating. Know your abilities, and be sure you understand how your boat handles under the different boating conditions you may encounter. Operate within your limits, and the limits of your boat. Always operate at safe speeds, and keep a careful watch for obstacles and other traffic. Always watch carefully for swimmers dur-

●

ing the engine operation.

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Stay away from swimming areas. When a swimmer is in the water near you

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shift into neutral and shut off the engine.

●

Do not illegally discard empty containers used to replace or replenish oil. For the correct processing of empty containers, consult the dealer where you purchased the oil.

●

When replacing oils used to lubricate the product (engine or gear oil), be sure to wipe away any spilt oil. Never pour oil without using a funnel or similar device. If necessary, verify the necessary replacement procedure with the dealer.

●

Never illegally discard (dump) the product. Yamaha recommends consulting the deal-

er on discarding the product. Be informed about boating safety. Additional publications and information can be obtained

from many organizations, including the following:

United States Coast Guard

Consumer Affairs Staff (G-BC) Office of Boating, Public, and Consumer Affairs U.S. Coast Guard Headquarters Washington, D.C. 20593-0001 Boating Safety Hotline: 1-800-368-5647

National Marine Manufacturers Association (NMMA)

401 N. Michigan Ave. Chicago, Il 60611

Marine Retailers Association of America

155 N. Michigan Ave. Chicago, Il 60601

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Important labels

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Warning labels

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Label

EWM01260

WARNING

●

Be sure shift control is in neutral before starting engine. (except 2HP)

●

Do not touch or remove electrical parts when starting or during operation.

●

Keep hands, hair, and clothes away from flywheel and other rotating parts while engine is running.

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Label

EWM01300

WARNING

This engine is equipped with a neutral

●

starting device.

●

The engine will not start unless the shift

control is in neutral position.

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Caution labels

General information

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Label

ECM01191

CAUTION:

Transport and store the engine only as shown. Otherwise, engine damage could result from leaking oil.

ZMU05630

EMU25500

Basic boating rules (Rules of

the road)

Just as there are rules which apply when you are driving on streets and high ways, there are waterway rules which apply when you are driving your boat. These rules are used internationally, and are also enforced by the United States Coast Guard and local agencies. You should be aware of these rules, and follow them whenever you encounter another vessel on the water. Several sets of rules prevail according to geographic location, but are all basically the same as the International Rules of the Road. The rules presented here in your Owner’s Manual are condensed, and have been provided for your convenience only. Consult your local U.S. Coast Guard Auxiliary or Department of Motor Vehicles for a complete set of rules governing the waters in which

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General information

you will be using your boat.

EMU25510

Steering and sailing rules and sound signals

Whenever two vessels on the water meet one another, one vessel has the right-ofway; it is called the “stand-on” vessel. The vessel which does not have the right-of-way is called the “give-way” or “burdened” vessel. These rules determine which vessel has the right-of-way, and what each vessel should do.

Stand-on vessel

The vessel with the right-of-way has the duty to continue its course and speed, except to avoid an immediate collision. When you maintain your direction and speed, the other vessel will be able to determine how best to avoid you.

Give-way vessel

The vessel which does not have the right-ofway has the duty to take positive and timely action to stay out of the way of the Stand-On vessel. Normally, you should not cross in front of the vessel with the right-of-way. You should slow down or change directions briefly and pass behind the other vessel. You should always move in such a way that the operator of the other vessel can see what you are doing.

“The general prudential rule”

This rule is called Rule 2 in the International Rules and says, “In obeying and construing these rules due regard shall be had to all dangers of navigation and collision, and to any special circumstances, which may render a departure from the above rules necessary in order to avoid immediate danger.” In other words, follow the standard rules except when a collision will occur unless both vessels try to avoid each other. If that is the

case, both vessels become “Give-Way” vessels.

EMU25520

Rules when encountering vessels

There are three main situations which you may encounter with other vessels which could lead to a collision unless the Steering Rules are followed:

Meeting:

sel head-on)

Crossing:

er vessel’s path)

Overtaking:

passed by another vessel) In the following illustration, your boat is in the center. You should give the right-of-way to any vessels shown in white area (you are the Give-Way vessel). Any vessels in the shaded area must yield to you (they are the GiveWay vessels). Both you and the meeting vessel must alter course to avoid each other.

Meeting

If you are meeting another power vessel head on, and are close enough to run the risk of collision, neither of you has the right-ofway! Both of you should alter course to avoid an accident. You should keep the other vessel on your port (left) side. This rule doesn’t apply if both of you will clear one another if you continue on your set course and speed.

(you are approaching another ves-

(you are traveling across the oth-

(you are passing or being

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Crossing

When two power driven vessels are crossing each other’s path close enough to run the risk of collision, the vessel which has the other on the starboard (right) side must keep out of the way of the other. If the other vessel is on your right, you must keep out of its way; you are the Give-Way vessel. If the other vessel is on your port (left) side, remember that you should maintain course and direction, provided the other vessel gives you the right-of-way as it should.

Overtaking

If you are passing another vessel, you are the “Give-Way” vessel. This means that the other vessel is expected to maintain its course and speed. You must stay out of its way until you are clear of it. Likewise, if another vessel is passing you, you should maintain your speed and direction so that the other vessel can steer itself around you.

General information

EMU25530

Other special situations

There are three other rules you should be aware of when driving your boat around other vessels.

Narrow channels and bends

When navigating in narrow channels, you should keep to the right when it is safe and practical to do so. If the operator of a powerdriven vessel is preparing to go around a bend that may obstruct the view of other water vessels, the operator should sound a prolonged blast on the whistle (4 to 6 seconds). If another vessel is around the bend, it too should sound the whistle. Even if no reply is heard, however, the vessel should still proceed around the bend with caution. If you navigate such waters with your boat, you will need to carry a portable air horn, available from local marine supply stores.

Fishing vessel right-of-way

All vessels which are fishing with nets, lines or trawls are considered to be “fishing vessels” under the International Rules. Vessels with trolling lines are not considered fishing vessels. Fishing vessels have the right-ofway regardless of position. Fishing vessels cannot, however, impede the passage of other vessels in narrow channels.

Sailing vessel right-of-way

Sailing vessels should normally be given the right-of-way. The exceptions to this are:

1. When the sailing vessel is overtaking the power-driven vessel, the power-driven vessel has the right-of-way.

2. Sailing vessels should keep clear of any fishing vessel.

3. In a narrow channel, a sailing vessel should not hamper the safe passage of a power-driven vessel which can navigate only in such a channel.

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General information

Reading buoys and other markers

The waters of the United states are marked for safe navigation by the lateral system of buoyage. Simply put, buoys and markers have an arrangement of shapes, colors, numbers and lights to show which side of the buoy a boater should pass on when navigating in a particular direction. The markings on these buoys are oriented from the perspective of being entered from seaward (the boater is going towards the port). This means that red buoys are passed on the starboard (right) side when proceeding from open water into port, and black buoys are to port (left) side. When navigating out of port, your position with respect to the buoys should be reversed; red buoys should be to port and black buoys to starboard. Many bodies of water used by boaters are entirely within the boundaries of a particular state. The Uniform State Waterway Marking System has been devised for these waters. This system uses buoys and signs with distinctive shapes and colors to show regulatory or advisory information. These markers are white with black letters and orange boarders. They signify speed zones, restricted areas, danger areas, and general information. Remember, markings may vary by geographic location. Always consult local boating authorities before driving your boat in unfamiliar waters.

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General information

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Fueling instructions

EWM00010

WARNING

GASOLINE AND ITS VAPORS ARE HIGHLY FLAMMABLE AND EXPLOSIVE!

●

Do not smoke when refueling, and keep

ZMU01708

away from sparks, flames, or other sources of ignition.

●

Stop engine before refueling.

●

Refuel in a well-ventilated area. Refuel portable fuel tanks off the boat.

●

Take care not to spill gasoline. If gasoline spills, wipe it up immediately with

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General information

dry rags.

●

Do not overfill the fuel tank. Tighten the filler cap securely after re-

●

fueling.

●

If you should swallow some gasoline, inhale a lot of gasoline vapor, or get gasoline in your eyes, get immediate medical attention. If any gasoline spills onto your skin, im-

●

mediately wash with soap and water. Change clothing if gasoline spills on it. Touch the fuel nozzle to the filler open-

●

ing or funnel to help prevent electrostatic sparks.

ECM00010

CAUTION:

Use only new clean gasoline which has been stored in clean containers and is not contaminated with water or foreign matter.

EMU25570

Gasoline

If knocking or pinging occurs, use a different brand of gasoline or premium unleaded fuel.

EMU31440

Engine oil

Recommended engine oil:

YAMALUBE 4-M FC-W oil or 4-stroke motor oil with a combination of the following SAE and API oil classifications

Engine oil type SAE:

10W-30 or 10W-40

Engine oil grade API:

SE, SF, SG, SH, SJ, SL

Engine oil quantity (excluding oil filter):

1.6 L (1.69 US qt) (1.41 Imp.qt)

NOTE:

If the recommended engine oil grades are not available, select an alternative from the following chart according to the average temperatures in your area.

Recommended gasoline:

Regular unleaded gasoline with a minimum octane rating of 86 (Pump Octane Number) = (R+M)/2

Gasohol

There are two types of gasohol: gasohol containing ethanol and that containing methanol. Gasohol containing ethanol can be used if ethanol content does not exceed 10% and the fuel meets minimum octane ratings. Yamaha does not recommended gasohol containing methanol because it can cause fuel system damage or engine performance problems.

ECM01050

CAUTION:

All 4-stroke engines are shipped from the factory without engine oil.

Page 17

ZMU01710

EMU25690

Battery requirement

ECM01060

CAUTION:

Do not use a battery that does not meet the specified capacity. If a battery which does not meet specifications is used, the electric system could perform poorly or be overloaded, causing electric system damage.

For electric start models, choose a battery which meets the following specifications.

General information

EMU25711

Battery specifications

Minimum cold cranking amps (CCA/ SAE):

F15CEH 245.0 A F15CPH 245.0 A F20EH 245.0 A F20ER 245.0 A F20PH 245.0 A

F20PR 245.0 A Minimum marine cranking amps (MCA/ ABYC):

F15CEH 323.0 A

F15CPH 323.0 A

F20EH 323.0 A

F20ER 323.0 A

F20PH 323.0 A

F20PR 323.0 A Minimum reserve capacity (RC/SAE):

F15CEH 52 minutes

F15CPH 52 minutes

F20EH 52 minutes

F20ER 52 minutes

F20PH 52 minutes

F20PR 52 minutes

EMU25730

Without a rectifier or Rectifier Regulator

ECM01090

CAUTION:

A battery cannot be connected to models that do not have a rectifier or Rectifier Regulator.

If you wish to use a battery with the models without a rectifier or Rectifier Regulator, install an optional Rectifier Regulator. Using a maintenance-free battery with the above models can shorten the life of the battery significantly. Install an optional Rectifier Regulator or use

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General information

accessories rated to withstand 18 volts or higher with the above models. Consult your Yamaha dealer for details on installing an optional Rectifier Regulator.

EMU25742

Propeller selection

The performance of your outboard motor will be critically affected by your choice of propeller, as an incorrect choice could adversely affect performance and could also seriously damage the motor. Engine speed depends on the propeller size and boat load. If engine speed is too high or too low for good engine performance, this will have an adverse effect on the engine. Yamaha outboard motors are fitted with propellers chosen to perform well over a range of applications, but there may be uses where a propeller with a different pitch would be more appropriate. For a greater operating load, a smaller-pitch propeller is more suitable as it enables the correct engine speed to be maintained. Conversely, a larger-pitch propeller is more suitable for a smaller operating load. Yamaha dealers stock a range of propellers, and can advise you and install a propeller on your outboard that is best suited to your application.

3. Type of propeller (propeller mark)

NOTE:

Select a propeller which will allow the engine to reach the middle or upper half of the operating range at full throttle with the maximum boat load. If operating conditions such as light boat loads then allow the engine r/min to rise above the maximum recommended range, reduce the throttle setting to maintain the engine in the proper operating range.

For instructions on propeller removal and installation, see page 66.

EMU25770

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.

1. Propeller diameter in inches

2. Propeller pitch in inches

123

ZMU04605

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Basic components

EMU25799

Main components

NOTE:

* May not be exactly as shown; also may not be included as standard equipment on all models.

F15C, F20

1. Top cowling

2. Top cowling lock lever

3. Drain screw

4. Anti-cavitation plate

5. Trim tab

6. Propeller

7. Cooling water inlet

8. Warning indicator(s)

9. Gear shift lever*

10. Engine stop button/Engine stop lanyard switch*

11. Throttle friction adjuster*

12. Throttle grip*

13. Power trim and tilt switch*

14. Clamp screw

15. Steering friction lever*

16. Rope attachment

17. Tilt support knob*

18. Flushing device

19. Starter button*

20. Remote control box (side mount type)*

21. Fuel tank*

EMU25802

Fuel tank

If your model was equipped with a portable

ZMU05518

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Basic components

fuel tank, its function is as follows.

EWM00020

WARNING

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.

ZMU02284

1. Fuel joint

2. Fuel gauge

3. Fuel tank cap

4. Air vent screw

EMU25830

Fuel joint

This joint is used to connect the fuel line.

EMU25841

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.

EMU25850

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.

EMU25860

Air vent screw

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

EMU26180

Remote control

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

1. Power trim and tilt switch

2. Remote control lever

3. Neutral interlock trigger

4. Neutral throttle lever

5. Main switch / choke switch

6. Engine stop lanyard switch

7. Throttle friction adjuster

EMU26190

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.

Page 21

1. Neutral “”

2. Forward “”

3. Reverse “”

4. Shift

5. Fully closed

6. Throttle

7. Fully open

EMU26201

Neutral interlock trigger

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

Basic components

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

1. Fully open

2. Fully closed

EMU25911

Tiller handle

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

1. Neutral interlock trigger

EMU26211

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.

NOTE:

The neutral throttle lever will operate only

ZMU01997

EMU25922

Gear shift lever

Pulling the gear shift lever towards you puts the engine in forward gear so that the boat moves ahead. Pushing the lever away from you puts the engine in reverse gear so that the boat moves astern.

Page 22

Basic components

1. Forward “”

2. Neutral “”

3. Reverse “”

EMU25941

ZMU05519

Throttle grip

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

ZMU05337

1. Throttle indicator

EMU25971

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.

EWM00031

WARNING

Do not overtighten the friction adjuster. If there is too much resistance, it could be difficult to move the remote control lever or throttle grip, which could result in an accident.

EMU25961

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.

Page 23

ZMU02001

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

EMU25990

Engine stop lanyard switch

The lock plate must be attached to the engine stop switch for the engine to run. The lanyard 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 lanyard will pull out the lock plate, stopping ignition to the engine. This will prevent the boat from running away under power.

EWM00120

WARNING

●

Attach the engine stop switch lanyard to a secure place on your clothing, or your arm or leg while operating.

●

Do not attach the lanyard to clothing that could tear loose. Do not route the lanyard where it could become entangled, preventing it from functioning.

●

Avoid accidentally pulling the lanyard 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.

Basic components

NOTE:

The engine cannot be started with the lock plate removed.

1. Lanyard

2. Lock plate

ZMU02003

1. Lanyard

2. Lock plate

EMU26001

Engine stop button

To open the ignition circuit and stop the engine, push this button.

Page 24

Basic components

ZMU02083

EMU26070

Manual starter handle

To start the engine, first gently pull the handle out until resistance is felt. From that position, then pull the handle straight out quickly to crank the engine.

EMU26090

Main switch

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

●

“”

(off)

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

●

“”

(on)

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

“”

●

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

(start)

ZMU05536

EMU26080

Starter button

To start the engine with the electric starter, push the starter button.

ZMU05521

EMU26102

Power tilt switch

The power tilt system adjusts the outboard motor angle in relation to the transom. Pushing the switch “” (up) tilts the outboard mo- tor up. Pressing the switch “” (down) tilts the outboard motor down. When the switch is released, the outboard motor will stop in its current position.

Page 25

Basic components

To increase resistance, turn the lever to the port side “A”. To decrease resistance, turn the lever to the starboard side “B”.

EWM00040

WARNING

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

ZMU05579

ZMU04899

NOTE:

For instructions on using the power tilt switch, see pages 38 and 41.

EMU31431

Steering friction adjuster

A friction device provides adjustable resistance to the steering mechanism, and can be set according to operator preference. An adjuster lever is located on the bottom of the tiller handle bracket.

If the resistance does not increase even when the lever is turned to the port side “A”, make sure that the nut is tightened to the specified torque.

ZMU05522

ZMU05523

1. Nut

Nut tightening torque:

5.8 Nm (4.3 ft-lb) (0.6 kgf-m)

Page 26

Basic components

NOTE:

●

Steering movement is blocked when the adjuster lever is set to the “A” position.

●

Check the tiller handle for smooth movement when the lever is turned to the starboard side “B”.

●

Do not apply lubricants such as grease to the friction areas of the steering friction adjuster.

EMU26122

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.

right or left by applying the same amount of force.

EWM00840

WARNING

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.

If the boat tends to veer the left (port side), turn the trim tab rear end to the port side “A” in the figure. If the boat tends to veer the right (starboard side), turn the trim tab end to the starboard side “B” in the figure.

ZMU02288

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

EWM00040

WARNING

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

EMU26250

Trim tab

The trim tab should be adjusted so that the steering control can be turned to either the

ZMU05524

1. Trim tab

2. Bolt

EMU26261

Trim rod (tilt pin)

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

Page 27

ZMU05525

EMU30530

Tilt lock mechanism

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

Basic components

the release position.

EMU26320

Tilt support knob

To keep the outboard motor in the tilted up position, push the tilt support knob under the swivel bracket.

ZMU02812

EMU26330

Tilt support bar

The tilt support bar keeps the outboard motor in the tilted up position.

ZMU05526

1. Tilt lock lever (Lock / tilt-down)

ZMU05631

1. Tilt lock lever (Release / tilt-up)

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

ZMU05528

EMU26360

Power tilt unit

This unit tilts the outboard motor up and down and is controlled with the power tilt switch.

ECM00630

CAUTION:

Do not step on or exert pressure on the power tilt motor. The power tilt unit could be damaged as a result.

Page 28

Basic components

ZMU05597

1. Power tilt unit

2. Power tilt motor

EMU26382

Top cowling lock lever (pull up type)

To remove the engine top cowling, pull up the 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 by moving the lever(s) downward.

EMU26460

Flushing device

This device is used to clean the cooling water passages of the motor using a garden hose and tap water.

NOTE:

For details on usage, see page 54.

1. Flushing device

EMU26302

Warning indicator

If the engine develops a condition which is cause for warning, the indicator lights up. For details on how to read the warning indicator, see page 22.

ZMU05530

1. Warning indicator

EMU26801

Warning system

ECM00090

CAUTION:

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

EMU26816

Overheat warning

This engine has an overheat warning device.

Page 29

If the engine temperature rises too high, the warning device will activate.

Activation of warning device

●

The engine speed will automatically decrease to about 2000 r/min.

●

If equipped with an overheat warning indicator, it will light or blink.

ZMU05592

●

The buzzer will sound (if equipped on the tiller handle, remote control box, or main switch panel).

Basic components

EMU30167

Low oil pressure warning

If the oil pressure drops too low, the warning device will activate.

Activation of warning device

●

The engine speed will automatically decrease to about 2000 r/min. If equipped with a low oil pressure warning

●

indicator, it will light or blink.

ZMU02360

If the warning system has activated, stop the engine and check the cooling water inlet for clogging.

ZMU05531

●

The buzzer will sound (if equipped on the tiller handle, remote control box, or main switch panel).

Page 30

Basic components

ZMU02360

If the warning system has activated, stop the engine as soon as it is safe to do so. Check the oil level and add oil as needed. If the oil level is correct and the warning device does not switch off, consult your Yamaha dealer.

ECM00100

CAUTION:

Do not continue to run the engine if the low oil pressure warning indicator is on. Serious engine damage could occur.

Page 31

Operation

EMU26901

Installation

ECM00110

CAUTION:

Incorrect engine height or obstructions to smooth water flow (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. Severe engine damage may result if the motor is operated continuously in the presence of airborne water spray.

NOTE:

During water testing check the buoyancy of the boat, at rest, with its maximum load. Check that the static water level on the exhaust housing is low enough to prevent water entry into the powerhead, when water rises due to waves when the outboard is not running.

EMU32010

Mounting the outboard motor

EWM00820

WARNING

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.

●

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.

EWM00830

WARNING

Improper mounting of the outboard motor could result in hazardous conditions such as poor handling, loss of control, or fire hazards. Observe the following:

●

For permanently mounted models, your dealer or other person experienced in proper rigging should mount the motor. If you are mounting the motor yourself, you should be trained by an experienced person.

●

For portable models, your dealer or other person experienced in proper outboard motor mounting should show you how to mount your motor.

1. Be sure to mount the outboard motor while the boat is on land. If the boat is on the water, move it to an area on land.

2. To prevent steering movement, turn the adjuster lever to “A”.

ZMU05632

3. Hold the handgrips and steering brackets as shown in the illustration and lift up the outboard motor using two people.

Page 32

Operation

boats without a keel or which are asymmetrical, consult your dealer.

1. Steering bracket

2. Handgrip

ZMU05633

1. Center line (keel line)

EMU26920

Mounting height

To run your boat at optimum efficiency, the water resistance (drag) of the boat and outboard motor must be made as little as possible. The mounting height of the outboard motor greatly affects the water resistance. If the mounting height is too high, cavitation tends to occur, thus reducing the propulsion; and if the propeller tips cut the air, the engine speed will rise abnormally and cause the engine to overheat. If the mounting height is too low, the water resistance will increase and thereby reduce engine efficiency. Mount the outboard motor so that the anti-cavitation plate is between the bottom of the boat and a level 25 mm (1 in.) below it.

ZMU01760

ZMU05634

4. Mount the outboard motor on the center line (keel line) of the boat, and ensure that the boat itself is well balanced. Otherwise the boat will be hard to steer. For

Page 33

Operation

NOTE:

●

The optimum mounting height of the outboard motor is affected by the boat and 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.

●

For instructions on setting the trim angle of the outboard motor, see page 38.

EMU26970

Clamping the outboard motor

1. Place the outboard motor on the transom 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.

EWM00640

WARNING

Loose clamp screws 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 transom screws are tightened securely. Occasionally check the screws for tightness during operation.

2. If the engine restraint cable attachment is equipped on your engine, an engine restraint cable or chain should be used. Attach one end to the engine 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.

ZMU02013

3. Secure the clamp bracket to the transom using the bolts provided with the outboard (if packed). For details, consult your Yamaha dealer.

EWM00650

WARNING

Avoid using bolts, nuts or washers other than those contained in the engine packaging. If used, they must be of at least the same quality of material and strength and must be tightened securely. After tightening, test run the engine and check their tightness.

ZMU02012

Page 34

Operation

ZMU02637

1. Bolts

EMU30173

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.

ECM00800

CAUTION:

Failure to follow the break-in procedure could result in reduced engine life or even severe engine damage.

EMU27081

Procedure for 4-stroke models

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

1. First hour: Run the engine at 2000 r/min or at approximately half throttle.

2. Second hour: Run the engine at 3000 r/min or at approximately three-quarter throttle.

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

4. After the first 10 hours: Operate the engine normally.

EMU27103

Preoperation checks

EWM00080

WARNING

If any item in the preoperation check is not working properly, have it inspected and repaired before operating the outboard motor. Otherwise an accident could occur.

ECM00120

CAUTION:

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

EMU27111

Fuel

Check to be sure you have plenty of fuel

●

for your trip. Make sure there are no fuel leaks or gaso-

●

line fumes.

●

Check fuel line connections to be sure they are tight (if equipped Yamaha fuel tank or boat tank).

●

Be sure the fuel tank is positioned on a secure, flat surface, and that the fuel line is not twisted or flattened, or likely to contact sharp objects (if equipped Yamaha fuel tank or boat tank).

EMU27130

Controls

●

Check throttle, shift, and steering for proper operation before starting the engine. The controls should work smoothly, with-

●

out binding or unusual free play.

●

Look for loose or damaged connections. Check operation of the starter and stop

●

switches when the outboard motor is in the water.

EMU27140

Engine

●

Check the engine and engine mounting.

Page 35

●

Look for loose or damaged fasteners.

●

Check the propeller for damage.

EMU27163

Checking the engine oil level

1. Put the outboard motor in an upright position (not tilted).

2. Remove oil dipstick and wipe it clean.

3. Completely insert the dipstick and remove it again.

4. Check the oil level using the dipstick to be sure the level falls between the upper and lower marks. Fill with oil if it is below the lower mark, or drain to the specified level if it is above the upper mark.

Operation

NOTE:

Be sure to completely insert the dipstick into the dipstick guide.

EMU27433

Filling fuel

EWM00060

WARNING

Gasoline and its vapors are highly flammable and explosive. Keep away from sparks, cigarettes, flames, or other sources of ignition.

1. Remove the fuel tank cap.

2. Carefully fill the fuel tank.

3. Securely close the cap after filling the tank. Wipe up any spilled fuel.

1. Oil dipstick

2. Lower level mark

3. Upper level mark

ZMU05598

Fuel tank capacity:

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

ZMU02834

EMU27270

Ring Free Fuel Additive

Gasoline is a precise blend of many different substances, each chosen to give certain characteristics. Gasoline blends have been changing in recent years in response to concerns about pollution and resulting emissions regulations. One of the most obvious changes has been the elimination of lead from most fuels. As gasoline has changed, the amount of additives such as aromatics and oxygenates

Page 36

Operation

has increased. These additives are important for the engines in passenger cars, but they can have detrimental effects in marine engines, because of increased deposits in the combustion chamber. When enough deposits collect, piston rings begin sticking. Performance drops and engine wear increases dramatically. While many additives available may reduce deposits, Yamaha recommends the use of

Ring Free Fuel Additive

your Yamaha dealer.

tive

has repeatedly proven its ability to clean

, available from

Ring Free Fuel Addi-

combustion deposits from inside the engine, notably the critical piston-ring-land area, and fuel system components. Follow product labeling for use instructions.

EMU27450

Operating engine

EMU27462

Feeding fuel (portable tank)

EWM00420

WARNING

●

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 cab-

in areas well ventilated. Avoid blocking exhaust outlets.

1. If there is an air vent screw on the fuel tank cap, loosen it 2 or 3 turns.

ZMU02295

2. If there is a fuel joint on the motor, firmly connect the fuel line to the joint. Then firmly connect the other end of the fuel line to the joint on the fuel tank.

ZMU05532

ZMU02024

3. If a steering friction adjuster is provided on your outboard motor, securely attach

Page 37

Operation

the fuel line to the fuel line clamp.

NOTE:

During engine operation place the tank horizontally, otherwise fuel cannot be drawn from the fuel tank.

4. Squeeze the primer pump with the outlet end up until you feel it become firm.

1. Arrow

EMU27490

Starting engine

EMU27542

Starting engine

1. Place the gear shift lever in neutral.

arm or leg. Then install the lock plate on the other end of the lanyard into the engine stop switch.

EWM00120

WARNING

●

Attach the engine stop switch lanyard to a secure place on your clothing, or your arm or leg while operating.

●

Do not attach the lanyard to clothing that could tear loose. Do not route the lanyard where it could become entangled, preventing it from functioning. Avoid accidentally pulling the lanyard

●

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.

ZMU05533

NOTE:

The start-in-gear protection device prevents the engine from starting except when in neutral.

2. Attach the engine stop switch lanyard to a secure place on your clothing, or your

ZMU02026

3. Place the throttle grip in the “” (start) position.

ZMU05600

Page 38

Operation

4. Pull the manual starter handle slowly until you feel resistance. Then give a strong pull straight out to crank and start the engine. Repeat if necessary.

ZMU05536

5. After the engine starts, slowly return the manual starter handle to its original position before releasing it.

NOTE:

●

When the engine is cold, it needs to be warmed up. For further information, see page 34.

●

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 73.

6. Slowly return the throttle grip to the fully closed position.

EMU27601

Electric start/prime start models

1. Place the gear shift lever in neutral.

NOTE:

The start-in-gear protection device prevents the engine from starting except when in neutral.

2. Attach the engine stop switch lanyard to a secure place on your clothing, or your arm or leg. Then install the lock plate on the other end of the lanyard into the engine stop switch.

EWM00120

WARNING

Attach the engine stop switch lanyard

●

to a secure place on your clothing, or your arm or leg while operating. Do not attach the lanyard to clothing

●

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

●

ZMU02026

3. Place the throttle grip in the “” (start) position. After the engine starts,

ZMU05533

return the throttle to the fully closed position.

Page 39

ZMU05600

4. Push the starter button to start the engine.

ZMU05521

Operation

NOTE:

●

When the engine is cold, it needs to be warmed up. For further information, see page 34.

●

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 73.

6. Slowly return the throttle grip to the fully closed position.

EMU27662

Electric start and remote control models

1. Place the remote control lever in neutral.

5. Immediately after the engine starts, release the starter button and allow it to return to its original position.

ECM00160

CAUTION:

●

Never push the starter button 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, release the starter button, wait 10 seconds, then crank the engine again.

NOTE:

The start-in-gear protection device prevents the engine from starting except when in neutral.

2. Attach the engine stop switch lanyard to a secure place on your clothing, or your arm or leg. Then install the lock plate on the other end of the lanyard into the engine stop switch.

EWM00120

WARNING

●

Attach the engine stop switch lanyard to a secure place on your clothing, or your arm or leg while operating.

●

Do not attach the lanyard to clothing that could tear loose. Do not route the lanyard where it could become entan-

Page 40

Operation

gled, preventing it from functioning.

●

3. Turn the main switch to “” (on).

4. Turn the main switch to “” (start), and hold it for a maximum of 5 seconds.

5. Immediately after the engine starts, release the main switch and allow it to return to “” (on).

ECM00191

CAUTION:

●

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.

NOTE:

●

When the engine is cold, it needs to be warmed up. For further information, see page 34.

●

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 73.

EMU27670

Warming up engine

EMU27710

Manual start and electric start models

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

2. Be sure the low oil pressure warning indicator goes off after starting the engine.

3. Check for a steady flow of water from the cooling water pilot hole.

ECM00210

CAUTION:

●

If the low oil pressure warning indicator does not go off after the engine starts, stop the engine. Otherwise serious engine damage could occur. Check the oil level and add oil if necessary. Consult your Yamaha dealer if the cause for the low oil pressure warning indicator cannot be found.

●

A continuous flow of water from the pi-

Page 41

lot hole shows that the water pump is pumping water through the cooling passages. 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.

Operation

ZMU05600

2. Move the gear shift lever quickly and firmly from neutral to forward.

EMU27740

Shifting

EWM00180

WARNING

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

ECM00220

CAUTION:

To change the boat direction or shifting position from forward to reverse or viceversa, first close the throttle so that the engine idles (or runs at low speeds).

EMU31960

Forward (tiller handle and remote control models)

Tiller handle models

1. Place the throttle grip in the fully closed position.

ZMU05543

NOTE:

The gear shift lever operates only when the throttle grip is in the fully closed position.

Remote control models

1. Pull up the neutral interlock trigger (if equipped) and move the remote control lever quickly and firmly from neutral to forward.

Page 42

Operation

EMU31970

Reverse (automatic reverse lock and power trim and tilt models)

EWM00190

WARNING

When operating in reverse, go slowly. Do not open the throttle more than half. Otherwise the boat could become unstable, which could result in loss of control and an accident.

Tiller handle models

1. Place the throttle grip in the fully closed position.

ZMU05600

2. Move the gear shift lever quickly and firmly from neutral to reverse.

equipped) and move the remote control lever quickly and firmly from neutral to reverse.

EMU31980

Reverse (manual tilt and hydro tilt models)

EWM00190

WARNING

When operating in reverse, go slowly. Do not open the throttle more than half. Otherwise the boat could become unstable, which could result in loss of control and an accident.

Tiller handle models

1. Place the throttle grip in the fully closed position.

ZMU05542

NOTE:

The gear shift lever operates only when the throttle grip is in the fully closed position.

Remote control models

1. Pull up the neutral interlock trigger (if

ZMU05600

2. On models equipped with a tilt lock lever, check that it is in the lock/down position.

Page 43

ZMU05541

3. Move the gear shift lever quickly and firmly from neutral to reverse.

ZMU05542

Operation

lever quickly and firmly from neutral to reverse.

EMU27820

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.

EMU27844

Procedure

1. Push and hold the engine stop button or turn the main switch to “” (off).

NOTE:

The gear shift lever operates only when the throttle grip is in the fully closed position.

Remote control models

1. Check that the tilt lock lever is in the lock position.

ZMU05541

2. Pull up the neutral interlock trigger (if equipped) and move the remote control

ZMU02083

Page 44

Operation

2. After stopping the engine, disconnect the fuel line if there is a fuel joint on the outboard motor.

ZMU05547

3. Tighten the air vent screw on the fuel tank cap (if equipped).

the engine stop switch, then turning the main switch to “” (off).

EMU27861

Trimming outboard motor

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.

EWM00740

WARNING

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.

ZMU02301

4. Remove the key if the boat will be left unattended.

NOTE:

The engine can also be stopped by pulling the lanyard and removing the lock plate from

1. Trim operating angle

EMU27872

Adjusting trim angle for manual tilt models

There are 4 or 5 holes provided in the clamp bracket to adjust the outboard motor trim an-

Page 45

Operation

gle.

1. Stop the engine.

2. Tilt the outboard motor up, and then remove the trim rod from the clamp bracket.

ZMU05601

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.

EWM00400

WARNING

●

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.

EMU27902

Adjusting trim angle (power tilt models)

EWM00751

WARNING

●

Be sure all people are clear of the outboard motor when adjusting the tilt angle, also be careful not to pinch any body parts between the drive unit and clamp bracket. 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. 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.

Tilt the engine to the desired angle using the power tilt switch.

NOTE:

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

Page 46

Operation

ZMU05579

NOTE:

Stay within the trim operating angle when trimming the outboard motor using the power tilt system.

ZMU04899

also be adjusted to help offset this effect. When the bow of the boat is down, it is easier to accelerate from a standing start onto plane.

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 “por- poise” (hop in the water), which could throw the operator and passengers overboard.

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

EMU27911

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. The trim tab can

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

Page 47

Operation

danger of “bow steering” and making operation difficult and dangerous.

NOTE:

Depending on the type of boat, the outboard motor trim angle may have little effect on the trim of the boat when operating.

EMU27933

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 casing from damage by collision with obstructions, and also to reduce salt corrosion.

EWM00220

WARNING

Be sure all people are clear of the outboard motor when tilting up and down, also be careful not to pinch any body parts between the drive unit and engine bracket.

EWM00250

WARNING

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.

ECM00241

CAUTION:

●

Before tilting the outboard motor, stop the engine by following the procedure on page 37. 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.

EMU27978

Procedure for tilting up (manual tilt models)

1. Place the gear shift lever in neutral.

ZMU05533

ZMU03087

2. Disconnect the fuel line from the outboard motor.

Page 48

Operation

ZMU05547

3. Place the tilt lock lever (if equipped) in the release/up position.

ZMU05548

EMU28007

Procedure for tilting up (power trim and tilt models / power tilt models)

1. Place the remote control lever / gear shift lever in neutral.

ZMU05533

4. Pull up the shallow water lever (if equipped).

5. Hold the rear of the top cowling with one hand and tilt the engine up fully.

6. Push the tilt support knob into the clamp bracket. Or the tilt support bar will turn to the lock position automatically.

ZMU05528

2. Disconnect the fuel line from the outboard motor or close the fuel cock.

ZMU05547

3. Press the power trim and tilt switch / power tilt switch “” (up) until the out- board motor has tilted up completely.

Page 49

Operation

ZMU02812

EWM00260

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 tilt unit loses pressure.

ZMU04900

ZMU05580

4. Push the tilt support knob into the clamp bracket or pull the tilt support lever toward you to support the engine.

5. Models equipped with trim rods: Once the outboard motor is supported with the tilt support lever, press the power trim and tilt switch / power tilt switch “” (down) to retract the trim rods.

ECM00250

CAUTION:

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

EMU30192

Procedure for tilting down (manual tilt models)

1. Place the tilt lock lever in the lock position.

Page 50

Operation

ZMU05541

2. Slightly tilt the engine up until the tilt support bar is automatically released.

ZMU05528

3. Slowly tilt the engine down.

EMU28055

Procedure for tilting down (power trim and tilt models / power tilt models)

1. Push the power trim and tilt switch / power tilt switch “” (up) until the outboard motor is supported by the tilt rod and the tilt support lever / tilt support knob becomes free.

2. Release the tilt support lever or pull out the tilt support knob.

ZMU02825

3. Push the power trim and tilt switch / power tilt switch “” (down) to lower the out- board motor to the desired position.

ZMU01936

ZMU05581

Page 51

EMU28060

ZMU04901

Cruising in shallow water

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

EMU28071

Cruising in shallow water (manual tilt models)

EWM00710

WARNING

●

Place the gear shift in neutral before using the shallow water cruising system.

●

Run the boat at the lowest possible speed when using the shallow water cruising system. The tilt lock mechanism does not work while the shallow water cruising system is being used. Hitting an underwater obstacle could cause the outboard motor to lift out of the water, resulting in loss of control.

●

Do not rotate the outboard motor 180° and operate the boat in reverse. Place the gear shift in reverse to operate the boat in reverse.

●

Use extra care when operating in reverse. Too much reverse thrust can cause the outboard motor to lift out of the water, increasing the chance of accident and personal injury.

●

Return the outboard motor to its normal position as soon as the boat is back in

Operation

deeper water.

ECM00260

CAUTION:

Do not tilt the outboard motor up so that the cooling water inlet on the lower unit is above the surface of the water when setting up for and cruising in shallow water. Otherwise severe damage from overheating can result.

EMU28123

Procedure

1. Place the gear shift lever in neutral.

ZMU05533

Page 52

Operation

ZMU03087

2. Place the tilt lock lever in the release/up position.

ZMU05548

3. Slightly tilt the outboard motor up. The tilt support bar will lock automatically, supporting the outboard motor in a partially raised position.

NOTE:

This outboard motor has 2 positions for shallow water cruising.

4. To return the outboard motor to the normal running position, place the gear shift lever in neutral, then place the tilt lock lever in the lock/down position.

ZMU05541

5. Slightly tilt the outboard motor up until the tilt support bar automatically returns to the free position.

6. Slowly lower the outboard motor to the normal position.

EMU28090

Power trim and tilt models / power tilt models

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

EWM00660

WARNING

●

Place the gear shift in neutral before setting up for shallow water cruising. Return the outboard motor to its normal

●

position as soon as the boat is back in deeper water.

ECM00260

CAUTION:

EMU28185

Procedure for power trim and tilt / power tilt models

1. Place the remote control lever / gear shift lever in neutral.

Page 53

Operation

ZMU05533

2. Slightly tilt the outboard motor up to the desired position using the power trim and tilt switch / power tilt switch.

UP DN

ZMU01935

ZMU05580

ZMU04900

3. To return the outboard motor to the normal running position, press the power trim and tilt switch / power tilt switch and slowly tilt the outboard motor down.

EMU28192

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 with salt deposits.

NOTE:

For cooling system flushing instructions, see page 50.

Cruising in turbid water

Yamaha strongly recommends that you use the optional chromium-plated water pump kit (not available for some models) if you use the outboard motor in turbid or muddy water conditions.

Page 54

Maintenance

EMU31480

Specifications

NOTE:

“(AL)” stated in the specification data below represents the numerical value for the aluminum propeller installed. Likewise, “(SUS)” represents the value for stainless steel propeller installed and “(PL)” for plastic propeller installed.

EMU28218

Dimension:

Overall length:

F15CEH 1048 mm (41.3 in) F15CMH 1048 mm (41.3 in) F15CPH 1048 mm (41.3 in) F20EH 1048 mm (41.3 in) F20ER 665 mm (26.2 in) F20MH 1048 mm (41.3 in) F20PH 1048 mm (41.3 in) F20PR 665 mm (26.2 in)

Overall width:

F15CEH 420 mm (16.5 in) F15CMH 420 mm (16.5 in) F15CPH 420 mm (16.5 in) F20EH 420 mm (16.5 in) F20ER 390 mm (15.4 in) F20MH 420 mm (16.5 in) F20PH 420 mm (16.5 in) F20PR 390 mm (15.4 in)

Overall height S:

F15CEH 1078 mm (42.4 in) F15CMH 1078 mm (42.4 in) F20EH 1078 mm (42.4 in) F20ER 1078 mm (42.4 in) F20MH 1078 mm (42.4 in) F20PR 1078 mm (42.4 in)

Overall height L:

1205 mm (47.4 in)

Transom height S:

F15CEH 438 mm (17.2 in)

F15CMH 438 mm (17.2 in) F20EH 438 mm (17.2 in) F20ER 438 mm (17.2 in) F20MH 438 mm (17.2 in) F20PR 443 mm (17.4 in)

Transom height L:

F15CEH 565 mm (22.2 in) F15CMH 565 mm (22.2 in) F15CPH 570 mm (22.4 in) F20EH 565 mm (22.2 in) F20ER 565 mm (22.2 in) F20MH 565 mm (22.2 in) F20PH 570 mm (22.4 in) F20PR 570 mm (22.4 in)

Weight (AL) S:

F15CEH 53.7 kg (118 lb) F15CMH 51.7 kg (114 lb) F20EH 53.7 kg (118 lb) F20ER 52.7 kg (116 lb) F20MH 51.7 kg (114 lb) F20PR 58.7 kg (129 lb)

Weight (AL) L:

F15CEH 55.7 kg (123 lb) F15CMH 53.7 kg (118 lb) F15CPH 60.7 kg (134 lb) F20EH 55.7 kg (123 lb) F20ER 54.7 kg (121 lb) F20MH 53.7 kg (118 lb) F20PH 60.7 kg (134 lb) F20PR 60.7 kg (134 lb)

Performance:

Full throttle operating range:

5000–6000 r/min

Maximum output:

F15CEH 11.0 kW@5500 r/min (15 HP@5500 r/min) F15CMH 11.0 kW@5500 r/min (15 HP@5500 r/min) F15CPH 11.0 kW@5500 r/min (15 HP@5500 r/min) F20EH 14.7 kW@5500 r/min (20

Page 55

Maintenance

HP@5500 r/min) F20ER 14.7 kW@5500 r/min (20 HP@5500 r/min) F20MH 14.7 kW@5500 r/min (20 HP@5500 r/min) F20PH 14.7 kW@5500 r/min (20 HP@5500 r/min) F20PR 14.7 kW@5500 r/min (20 HP@5500 r/min)

Idling speed (in neutral):

1050 ±50 r/min

Engine:

Type:

4-stroke L

Displacement:

362.0 cm

Bore × stroke:

63.0 × 58.1 mm (2.48 × 2.29 in)

Ignition system:

CDI (micro computer)

Spark plug (NGK):

DPR6EB-9

Spark plug gap:

0.8–0.9 mm (0.031–0.035 in)

Control system:

F15CEH Tiller F15CMH Tiller F15CPH Tiller F20EH Tiller F20ER Remote control F20MH Tiller F20PH Tiller F20PR Remote control

Starting system:

F15CEH Electric F15CMH Manual F15CPH Electric F20EH Electric F20ER Electric F20MH Manual F20PH Electric

F20PR Electric

Starting carburetion system:

Prime start

Valve clearance (cold engine) IN:

0.15–0.25 mm (0.0059–0.0098 in)

Valve clearance (cold engine) EX:

0.25–0.35 mm (0.0098–0.0138 in)

Min. cold cranking amps (CCA/SAE):

F15CEH 245.0 A F15CPH 245.0 A F20EH 245.0 A F20ER 245.0 A F20PH 245.0 A F20PR 245.0 A

Min. marine cranking amps (MCA/ABYC):

F15CEH 323.0 A F15CPH 323.0 A F20EH 323.0 A F20ER 323.0 A F20PH 323.0 A F20PR 323.0 A

Min. reserve capacity (RC/SAE):

F15CEH 52 minutes F15CPH 52 minutes F20EH 52 minutes F20ER 52 minutes F20PH 52 minutes F20PR 52 minutes

Alternator output for battery DC:

10.0 A

Drive unit:

Gear positions:

Forward-neutral-reverse

Gear ratio:

2.08 (27/13)

Trim and tilt system:

F15CEH Manual tilt F15CMH Manual tilt F15CPH Power tilt F20EH Manual tilt F20ER Manual tilt

Page 56

Maintenance

F20MH Manual tilt F20PH Power tilt F20PR Power tilt

Propeller mark:

Fuel and oil:

Recommended fuel:

Regular unleaded gasoline

Min. pump octane:

Fuel tank capacity:

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

Recommended engine oil:

4-stroke outboard motor oil

Engine oil grade API:

API SE, SF, SG, SH, SJ, SL

Engine oil type SAE:

SAE10W30 or SAE10W40

Lubrication:

Wet sump

Engine oil quantity (excluding oil filter):

1.6 L (1.69 US qt) (1.41 Imp.qt)

Recommended gear oil:

Hypoid gear oil SAE#90

Gear oil quantity:

250.0 cm

(8.45 US oz) (8.82 Imp.oz)

Tightening torque for engine:

Spark plug:

18.0 Nm (13.3 ft-lb) (1.84 kgf-m)

Propeller nut:

17.0 Nm (12.5 ft-lb) (1.73 kgf-m)

Engine oil drain bolt:

28.0 Nm (20.7 ft-lb) (2.86 kgf-m)

Engine oil filter:

18.0 Nm (13.3 ft-lb) (1.84 kgf-m)

EMU28223

Transporting and storing

outboard motor

EWM00690

WARNING

●

Leaking fuel is a fire hazard. When

transporting and storing the outboard motor, close the air vent screw and fuel cock to prevent fuel from leaking.

●

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.

EWM00700

WARNING

Never get under the lower unit while it is tilted, even if a motor support bar is used. Severe injury could occur if the outboard motor accidentally falls.

ECM00660

CAUTION:

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.

The outboard motor should be trailered 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.

EMU32030

Dismounting the outboard motor

1. Stop the engine and land the boat.

2. Disconnect the fuel line from the outboard motor.

3. For electric start models, disconnect the battery cables from the battery termi-

Page 57

nals.

4. To prevent steering movement, turn the adjuster lever to “A”.

ZMU05632

Maintenance

5. Loosen the clamp screw(s).

6. Hold the handgrips and steering brackets as shown in the illustration and lift up the outboard motor to dismount it from the boat.

1. Steering bracket

2. Handgrip

ZMU05633

ZMU05634

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

ZMU05630

NOTE:

Place a towel or something similar under the

Page 58

Maintenance

outboard motor to protect it from damage.

EMU28241

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. 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.

ECM01080

CAUTION:

●

To prevent problems which can be caused by oil entering the cylinder from the sump, keep the outboard motor in the attitude shown when transporting and storing it. If storing or transporting the outboard motor on its side (not upright), put it on a cushion after draining the engine oil.

●

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, wellventilated place, not in direct sunlight.

EMU28303

Procedure

EMU32040

Flushing in a test tank

1. Dismount the outboard motor from the boat. For further details, see page 50.

2. Wash the outboard motor body using fresh water. For further information, see page 55.

3. Fill the fuel tank with fresh fuel and add one ounce of “Yamaha Fuel Conditioner

and Stabilizer” (Part No. LUB-FUELC12-00) to each gallon of fuel.

NOTE:

The use of “Yamaha Fuel Conditioner and Stabilizer” eliminates the need to drain the fuel system. Consult your Yamaha dealer or other qualified mechanic if the fuel system is to be drained instead.

4. Disconnect the fuel line from the outboard motor.

5. Remove the engine top cowling and silencer cover. Remove the propeller. For further details, see page 67.

6. Position the outboard motor on a water tank. For further details, see page 25.

ZMU02051

1. Water surface

2. Lowest water level

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

ECM00300

CAUTION:

Do not run the engine without supplying it with cooling water. Either the engine water pump will be damaged or the engine will be damaged from overheating. Before starting the engine, be sure to supply water to the cooling water passag-

Page 59

Maintenance

es.

ECM00290

CAUTION:

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.

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

EWM00090

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.

9. Run the engine at a fast idle for 10–15 minutes in neutral position.

10. Just prior to turning off the engine, quickly spray “Yamaha Stor-Rite Engine Fogging Oil” (Part No. LUB-STRRT-12-

00) 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.

11. Remove the outboard motor from the test tank. For further details, see page

50.

12. Drain the cooling water completely out of the motor. Clean the body thoroughly.

13. Install the silencer cover/cap and top cowling.

EMU28401

Lubrication

1. Grease the spark plug threads and install the spark plug(s) and torque to proper specification. For information on spark plug installation, see page 60.

2. Change the gear oil. For instructions, see page 68. Inspect the oil for the presence of water that indicates a leaky seal. Seal replacement should be performed by an authorized Yamaha dealer prior to use.

3. Grease all grease fittings. For further details, see page 59.

EMU28421

Cleaning and anticorrosion measures

1. Wash down the exterior of the outboard motor with fresh water and dry off completely.

2. Spray the outboard motor exterior with “Yamaha Silicone Protectant” (Part No. LUB-SILCNE-13-00).

3. Wax the cowling with a non-abrasive wax such as “Yamaha Silicone Wax” (Part No. ACC-11000-15-02).

EMU28430

Battery care

EWM00330

WARNING

Battery electrolytic fluid is dangerous; it contains sulfuric acid and therefore is poisonous and highly caustic. Always follow these preventive measures:

●

Avoid bodily contact with electrolytic fluid as it can cause severe burns or permanent eye injury.

●

Wear protective eye gear when han-

Page 60

Maintenance

dling or working near batteries.

Antidote (EXTERNAL):

SKIN - Flush with water.

●

EYES - Flush with water for 15 minutes and get immediate medical attention.

Antidote (INTERNAL):

●

Drink large quantities of water or milk followed by milk of magnesia, beaten egg, or vegetable oil. Get immediate

medical attention. Batteries also generate explosive hydrogen gas; therefore, you should always follow these preventive measures:

●

Charge batteries in a well-ventilated ar-

ea.

●

Keep batteries away from fire, sparks,

or open flames (for example: welding

equipment, lighted cigarettes, and so

on.)

●

DO NOT SMOKE when charging or han-

dling batteries. KEEP BATTERIES AND ELECTROLYTIC FLUID OUT OF REACH OF CHILDREN.

Batteries vary among manufacturers. Therefore the following procedures may not always apply. Consult your battery manufacturer’s instructions. Procedure

1. Disconnect and remove the battery from

the boat. Always disconnect the black negative cable first to prevent the risk of shorting.

2. Clean the battery casing and terminals.

Fill each cell to the upper level with distilled water.

3. Store the battery on a level surface in a

cool, dry, well-ventilated place out of direct sunlight.

4. Once a month, check the specific gravity

of the electrolyte and recharge as required to prolong battery life.

EMU28442

Flushing power unit

Perform this procedure right after operation for the most thorough flushing.

ECM01530

CAUTION:

Do not perform this procedure while the engine is running. The water pump may be damaged and severe damage from overheating can result.

1. After shutting off the engine, unscrew the garden hose connector from the fitting on the bottom cowling.

1. Fitting

2. Garden hose connector

3. Garden hose adapter

2. Screw the garden hose adapter onto a garden hose, which is connected to a fresh water supply, and then connect it to the garden hose connector.

ZMU05556

Page 61

3. With the engine off, turn on the water tap and let the water flush through the cooling passages for about 15 minutes. Turn off the water and disconnect the garden hose adapter from the garden hose connector.

4. Reinstall the garden hose connector onto the fitting on the bottom cowling. Tighten the connector securely.

ECM00540

CAUTION:

Do not leave the garden hose connector loose on the bottom cowling fitting or let the hose hang free during normal operation. Water will leak out of the connector instead of cooling the engine, which can cause serious overheating. Be sure the connector is tightened securely on the fitting after flushing the engine.

NOTE:

When flushing the engine with the boat in

●

the water, tilting up the outboard motor until it is completely out of the water will achieve better results. For cooling system flushing instructions,

●

see page 50.

EMU28450

Cleaning the outboard motor

After use, wash the exterior of the outboard motor with fresh water. Flush the cooling system with fresh water.

Maintenance

NOTE:

For cooling system flushing instructions, see page 50.

EMU28460

Checking painted surface of motor

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

EMU28486

Periodic maintenance

EWM01070

WARNING

Be sure to turn off the engine when you perform maintenance unless otherwise specified. If you or the owner is not familiar with machine servicing, this work should be done by your Yamaha dealer or other qualified mechanic.

Maintenance, replacement, or repair of the emission control devices and systems may be performed by any marine engine repair establishment or individual. All warranty repairs, however, including those to the emission control system, must be performed by an authorized Yamaha marine dealership.

A service manual is available for purchase through your Yamaha dealer for owners who

Page 62

Maintenance

have the mechanical skills, tools, and other equipment necessary to perform maintenance not covered by this owner’s manual.

EMU28510

Replacement parts

If replacement parts are necessary, use only genuine Yamaha parts or parts of the same type and of equivalent strength and materials. 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.

Page 63

Maintenance

EMU28522

Maintenance chart

Frequency of maintenance operations may be adjusted according to the operating conditions, but the following table gives general guidelines. Refer to the sections in this chapter for explanations of each owner-specific action.

NOTE:

When operating in salt water, turbid or muddy 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) (internal)

Battery Inspection / charging

Cooling water passages

Cowling clamp Inspection

Fuel ﬁlter (can be disassembled)

Fuel system Inspection

Fuel tank (Yamaha portable tank)

Gear oil Change

Greasing points Greasing

Idling speed (carburetor models)

Power trim and tilt unit Inspection

Propeller and cotter pin

Shift link / shift cable Inspection / adjustment

Thermostat

Throttle link / throttle cable / throttle pick-up timing

Inspection / replacement

Cleaning

Inspection / cleaning

Inspection

Inspection / replacement

Inspection / adjustment

10 hours

(1 month)

50 hours

months)

100 hours (6 months)

200

hours (1

year)

Page 64

Maintenance

Item Actions

Water pump

Engine oil Inspection / change

Oil ﬁlter (cartridge) Change

Spark plug(s)

Timing belt

Valve clearance (OHC, OHV)

EMU28874

Maintenance chart (additional)

Item Actions

Timing belt Replacement

Exhaust guide, exhaust manifold

EMU28910

Inspection / replacement

Cleaning / adjustment / replacement

Inspection / replacement

Inspection / adjustment

Inspection / replacement

Initial Every

10 hours

(1 month)

500 hours (2.5 years) 1000 hours (5 years)

50 hours

months)

Every

100 hours (6 months)

200

hours (1

year)

NOTE:

When using lead or high-sulfur gasoline, inspecting valve clearance may be required more frequently than every 500 hours.

Page 65

EMU28931

Greasing

Yamaha marine grease (Water resistant grease)

F15CEH, F15CMH, F15CPH, F20EH, F20MH, F20PH

Maintenance

ZMU05557

Page 66

Maintenance

F20ER, F20PR

EMU28953

Cleaning and adjusting spark plug

EWM00560

WARNING

When removing or installing a spark plug, be careful not to damage the insulator. A damaged insulator could allow external sparks, which could lead to explosion or

ZMU05595

fire.

EWM01550

WARNING

The engine will still be very hot when it has just been turned off. Take extremely care so that neither you nor anyone else gets burnt. To avoid burns, work on the engine when it has cooled down.

The spark plug is an important engine component and is easy to inspect. The condition

Page 67

Maintenance

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 remove and inspect the spark plug because heat and deposits will cause the spark plug to slowly break down and erode. If electrode erosion becomes excessive, or if carbon and other deposits are excessive, you should replace the spark plug with another of the correct type.

Standard spark plug:

DPR6EB-9

Before fitting the spark plug, measure the electrode gap with a wire thickness gauge; adjust the gap to specification if necessary.

spark plug to the correct torque.

Spark plug torque:

18.0 Nm (13.3 ft-lb) (1.84 kgf-m)

NOTE:

If a torque-wrench is not available when you are fitting a spark plug, a good estimate of the correct torque is 1/4 to 1/2 a turn past finger-tight. Have the spark plug adjusted to the correct torque as soon as possible with a torque-wrench.

EMU28962

Checking fuel system

EWM00060

WARNING

Gasoline and its vapors are highly flammable and explosive. Keep away from sparks, cigarettes, flames, or other sources of ignition.

EWM00910

WARNING

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.

1. Spark plug gap

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

3. Spark plug part number

Spark plug gap:

0.8–0.9 mm (0.031–0.035 in)

When fitting the plug, always clean the gasket surface and use a new gasket. Wipe off any dirt from the threads and screw in the

Check the fuel lines for leaks, crack, or malfunction. If a problem is found, your Yamaha dealer or other qualified mechanic should repair it immediately.

Page 68

Maintenance

ZMU05558

spilled fuel immediately.

●

The fuel filter must be reassembled carefully with the O-ring, filter cup, and hoses in place. Improper assembly or replacement could result in a fuel leak, which could result in a fire or explosion hazard.

EMU29001

Cleaning fuel filter

1. Remove the nut holding the fuel filter assembly if equipped.

Checkpoints

Fuel system parts leakage

●

Fuel line joint leakage

●

Fuel line cracks or other damage Fuel connector leakage

●

EMU28980

Inspecting fuel filter

EWM00310

WARNING

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.

●

Do not perform this procedure on a hot or running engine. Allow the engine to cool.

●

There will be fuel in the fuel filter. Keep away from sparks, cigarettes, flames or other sources of ignition.

●

This procedure will allow some fuel to spill. Catch fuel in a rag. Wipe up any

ZMU05559

1. Nut

2. Unscrew the filter cup, catching any spilled fuel in a rag.

3. Remove the filter element, and wash it in solvent. Allow it to dry. Inspect the filter element and O-ring to make sure they are in good condition. Replace them if necessary. If any water is found in the fuel, the Yamaha portable fuel tank or other fuel tanks should be checked and cleaned.

Page 69

1. Filter cup

2. Filter element

3. Filter housing

4. O-ring

ZMU02079

Maintenance

on whether testing is conducted with the flushing attachment, in a test tank, or with the outboard motor in the water.

1. Start the engine and allow it to warm up fully in neutral until it is running smoothly.

NOTE:

Correct idling speed inspection is only possible if the engine is fully warmed up. If not warmed up fully, the idle speed will measure higher than normal. If you have difficulty verifying the idle speed, or the idle speed requires adjustment, consult a Yamaha dealer or other qualified mechanic.

4. Reinstall the filter element in the cup. Make sure the O-ring is in position in the cup. Firmly screw the cup onto the filter housing.

5. Attach the filter assembly to the bracket so that the fuel hoses are attached to the filter assembly.

6. Run the engine and check the filter and lines for leaks.

EMU29041

Inspecting idling speed

EWM00451

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.

ECM00490

CAUTION:

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

2. Verify whether the idle speed is set to specification. For idle speed specifications, see page 48.

EMU29073

Changing engine oil

EWM00760

WARNING

Avoid draining the engine oil immedi-

●

ately after stopping the engine. The oil is hot and should be handled with care to avoid burns.

●

Be sure the outboard motor is securely fastened to the transom or a stable stand.

ECM00970

CAUTION:

●

Do not overfill the oil, and be sure the outboard motor is upright (not tilted) when checking and changing the engine oil.

●

If the oil level is above the upper level mark, drain until the level meets the specified capacity. Overfilling the oil

A diagnostic tachometer should be used for this procedure. Results may vary depending

Page 70

Maintenance

could cause leakage or damage.

ECM01240

CAUTION:

Change the engine oil after the first 10 hours of operation, and every 100 hours or at 6-month intervals thereafter. Otherwise the engine will wear quickly.

NOTE:

Change the engine oil when the oil is still warm.

1. Put the outboard motor in an upright position (not tilted).

ZMU05554

2. Prepare a suitable container that holds a larger amount than the engine oil capacity. Loosen and remove the drain screw while holding the container under the drain hole. Then remove the oil filler cap. Let the oil drain completely. Wipe up any spilled oil immediately.

ZMU05561

1. Drain screw

3. Put a new gasket on the oil drain screw. Apply a light coat of oil to the gasket and install the drain screw.

Drain screw tightening torque:

28.0 Nm (20.7 ft-lb) (2.86 kgf-m)

NOTE:

If a torque wrench is not available when you are installing the drain screw, finger tighten the screw just until the gasket comes into contact with the surface of the drain hole. Then tighten 1/4 to 1/2 turn more. Tighten the drain screw to the correct torque with a torque wrench as soon as possible.

4. Add the correct amount of oil through the filler hole. Install the filler cap.

Recommended engine oil:

4-stroke outboard motor oil

Engine oil quantity (excluding oil filter):

1.6 L (1.69 US qt) (1.41 Imp.qt)

Page 71

Maintenance

ZMU05562

1. Oil ﬁller cap

5. Start the engine and watch to make sure the low oil pressure warning indicator (if equipped) turns off. Make sure that there are no oil leaks.

ECM00680

CAUTION:

If the low oil pressure warning indicator does not turn off or if there are oil leaks, stop the engine and find the cause. Continued operation with a problem could cause severe engine damage. Consult your Yamaha dealer if the problem cannot be located and corrected.

6. Turn off the engine and wait 3 minutes. Recheck the oil level using the dipstick to be sure the level falls between the upper and lower marks. Fill with oil if it is below the lower mark, or drain to the specified level if it is above the upper mark.

ZMU02058

7. Dispose of used oil according to local regulations.

NOTE:

●

For more information on the disposal of used oil, consult your Yamaha dealer.

●

Change the oil more often when operating the engine under adverse conditions such as extended trolling.

EMU29112

Checking wiring and connectors

●

Check that each grounding wire is properly secured. Check that each connector is engaged se-

●

curely.

ZMU02087

EMU29120

Exhaust leakage

Start the engine and check that no exhaust leaks from the joints between the exhaust cover, cylinder head, and body cylinder.

Page 72

Maintenance

EMU29130

Water leakage

Start the engine and check that no water leaks from the joints between the exhaust cover, cylinder head, and body cylinder.

EMU29140

Engine oil leakage

Check for oil leaks on the around the engine.

NOTE:

If any leaks are found, consult your Yamaha dealer.

EMU29163

Checking power trim and tilt / power tilt system

EWM00430

WARNING

●

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. Make sure no one is under the outboard

●

motor before performing this test.

1. Check the power trim and tilt unit / power tilt unit for any sign of oil leaks.

pushed out completely.

4. Check that the trim and tilt rod / the tilt rod is free of corrosion or other flaws.

5. Tilt the outboard motor down. Check that the trim and tilt rod / the tilt rod operates smoothly.

NOTE:

Consult your Yamaha dealer if any operation is abnormal.

EMU29171

Checking propeller

EWM00321

WARNING

You could be seriously injured if the engine accidentally starts when you are near the propeller.

●

Before inspecting, removing, or installing the propeller, remove the spark plug caps from the spark plugs. Also, place the shift control in neutral, turn the main switch to “” (off) and re- move the key, and remove the lanyard from the engine stop switch. Turn off the battery cut-off 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.

1. Trim and tilt rod

2. Operate each of the power trim and tilt switches / power tilt switches to check that all switches work.

3. Tilt the outboard motor up and check that the trim and tilt rod / the tilt rod is

Page 73

ZMU05563

ZMU01897

Maintenance

age.

NOTE:

If the shear pin equipped: it is designed to break if the propeller hits a hard underwater obstacle to help protect the propeller and drive mechanism. The propeller will then spin freely on the shaft. If this happens, the shear pin must be replaced.

EMU30660

Removing the propeller

EMU29194

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).

Checkpoints

Check each of the propeller blades for

●

wear, erosion from cavitation or ventilation, or other damage. Check the propeller shaft for damage.

●

Check the splines / shear pin for wear or damage. Check for fish line tangled around the pro-

●

peller shaft.

●

Check the propeller shaft oil seal for dam-

1. Cotter pin

2. Propeller nut

3. Washer

4. Propeller

5. Thrust washer

ZMU02062

3. Remove the propeller and thrust washer.

EMU30670

Installing the Propeller

EMU29231

Spline models

ECM00340

CAUTION:

●

Be sure to install the thrust washer before installing the propeller, otherwise

Page 74

Maintenance

the lower case and propeller boss could be damaged. Be 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 Yamaha marine grease or a corrosion resistant grease to the propeller shaft.

2. Install the spacer (if equipped), thrust washer, and propeller on the propeller shaft.

3. Install the spacer (if equipped) and the washer. Tighten the propeller nut to the specified torque.

4. Align the propeller nut with the propeller shaft hole. Insert a new cotter pin in the hole and bend the cotter pin ends.

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.

ZMU02323

1. Gear oil drain screw

2. Oil level plug

ZMU02063

NOTE:

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

EMU29282

Changing gear oil

EWM00800

WARNING

●

Be sure the outboard motor is securely fastened to the transom or a stable stand. You could be severely injured if

NOTE:

●

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.

ECM00710

CAUTION:

Inspect the used oil after it has been drained. If the oil is milky, water is getting into the gear case which can cause gear damage. Consult a Yamaha dealer for re-

Page 75

Maintenance

pair of the lower unit seals.

NOTE:

For disposal of used oil, consult your Yamaha dealer.

5. With the outboard motor in a vertical position, and using a flexible or pressurized filling device, inject the gear oil into the gear oil drain screw hole.

Recommended gear oil:

Hypoid gear oil SAE#90

Gear oil quantity:

250.0 cm

(8.45 US oz) (8.82 Imp.oz)

ZMU02065

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 before 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 explosion hazard.

●

Dispose of old gasoline according to local 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.

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.

7. Put a new gasket on the gear oil drain screw. Insert and tighten the gear oil drain screw.

EMU29302

Cleaning fuel tank

EWM00920

WARNING

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

If you have any question about properly

●

doing this procedure, consult your

ZMU02324

4. Clean the filter (located on the end of the suction pipe) in a suitable cleaning solvent. Allow the filter to dry.

5. Replace the gasket with a new one. Reinstall the fuel joint assembly and tighten the screws firmly.

EMU29312

Inspecting and replacing anode(s)

Yamaha outboard motors are protected from

Page 76

Maintenance

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.

ECM00720

CAUTION:

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

NOTE:

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.

ZMU05564

EMU29320

Checking battery (for electric start models)

EWM00330

WARNING

Battery electrolytic fluid is dangerous; it contains sulfuric acid and therefore is poisonous and highly caustic. Always follow these preventive measures:

Avoid bodily contact with electrolytic

●

fluid as it can cause severe burns or permanent eye injury. Wear protective eye gear when han-

●

dling or working near batteries.

Antidote (EXTERNAL):

SKIN - Flush with water.

●

EYES - Flush with water for 15 minutes and get immediate medical attention.

Antidote (INTERNAL):

●

Drink large quantities of water or milk followed by milk of magnesia, beaten egg, or vegetable oil. Get immediate

medical attention. Batteries also generate explosive hydrogen gas; therefore, you should always follow these preventive measures:

Charge batteries in a well-ventilated ar-

●

ea.

●

Keep batteries away from fire, sparks,

or open flames (for example: welding

equipment, lighted cigarettes, and so

on.)

DO NOT SMOKE when charging or han-

●

dling batteries. KEEP BATTERIES AND ELECTROLYTIC FLUID OUT OF REACH OF CHILDREN.

ECM00360

CAUTION:

●

A poorly maintained battery will quickly

Page 77

Maintenance

deteriorate.

●

Ordinary tap water contains minerals harmful to a battery, and should not be used for topping up.

1. Check the electrolyte level at least once a month. Fill to the manufacturer’s recommended level when necessary. Top up only with distilled water (or pure deionized water suitable to use in batteries).

2. Always keep the battery in a good state of charge. Installing a voltmeter will help you monitor your battery. If you will not use the boat for a month or more, remove the battery from the boat and store it in a cool, dark place. Completely recharge the battery before using it.

3. If the battery will be stored for longer than a month, check the specific gravity of the fluid at least once a month and recharge the battery when it is low.

NOTE:

Consult a Yamaha dealer when charging or re-charging batteries.

EMU29331

Connecting the battery

EWM00570

WARNING

Mount the battery holder securely in a dry, well-ventilated, vibration-free loca-

tion in the boat. Install a fully charged battery in the holder.

ECM01121

CAUTION:

●

Make sure the main switch (on applicable models) is “” (off) before work- ing on the battery.

●

Reversal of the battery cables will damage the electrical parts.

●

Connect the red battery cable first when installing the battery and disconnect the black battery cable first when removing it. Otherwise, the electrical parts can be damaged.

●

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

Connect the red battery cable to the POSITIVE (+) terminal first. Then connect the black battery cable to the NEGATIVE (-) terminal.

1. Red cable

2. Black cable

3. Battery

EMU29370

Disconnecting the battery

Disconnect the BLACK cable from the NEGATIVE (-) terminal first. Then disconnect the RED cable from the POSITIVE (+) terminal.

Page 78

Maintenance

EMU29390

Checking top cowling

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

EMU29400

Coating the boat bottom

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.

Page 79

Trouble Recovery

EMU29424

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 warning 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 31.

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 stop switch lanyard not attached? A. Attach lanyard.

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 80

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 warning system activated? A. Find and correct cause of warning.

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.

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.

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

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

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?

Page 81

Trouble Recovery

A. Have serviced by a Yamaha dealer.

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.

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. Are weeds or other foreign matter tangled 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 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. Has warning system activated? A. Find and correct cause of warning.

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

Q. Are spark plug(s) fouled or of incorrect type? A. Inspect spark plug(s). Clean or replace with recommended 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. Is air vent screw closed? A. Open the air vent screw.

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

Page 82

Trouble Recovery

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

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

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.

EMU29433

Temporary action in

emergency

EMU29440

Impact damage

EWM00870

WARNING

The outboard motor can be seriously

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

1. Stop the engine immediately.

2. Inspect the control system and all components for damage. Also inspect the boat for damage.

3. Whether damage is found or not, return to the nearest harbor slowly and carefully.

4. Have a Yamaha dealer inspect the outboard motor before operating it again.

EMU29462

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.

EWM00630

WARNING

Be sure to use the specified fuse. An incorrect fuse or a piece of wire could allow excessive current flow. This could cause electric system damage and a fire hazard.

Page 83

1. Fuse puller

2. Cap

3. Fuse (20 A)

4. Spare fuse (20 A)

ZMU05565

ZMU03562

1. Fuse puller

2. Fuse (20 A)

NOTE:

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

EMU29522

Power trim and tilt / power tilt will not operate

If the engine cannot be tilted up or down with the power trim and tilt / the power tilt because of a discharged battery or a failure with the power trim and tilt unit / the power tilt unit, the engine can be tilted manually.

1. Loosen the manual valve screw by turn-

Trouble Recovery

ing it counterclockwise until it stops.

1. Manual valve screw

2. Put the engine in the desired position, then tighten the manual valve screw by turning it clockwise.

EMU29532

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.

EWM01021

WARNING

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 stop switch lanyard to a secure place on your clothing, or your arm or leg while operating the boat.

●

Do not attach the lanyard to clothing that could tear loose. Do not route the cord where it could become entangled,

Page 84

Trouble Recovery

preventing it from functioning.

●

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 flywheel 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 electrical components when starting or operating the motor. You could get an electrical shock.

EMU31992

Emergency starting engine (manual starter model)

1. Remove the top cowling.

2. Remove the dust cover.

3. Disconnect the start-in-gear protection cable from the starter, if equipped.

ZMU05603

4. Remove the starter/flywheel cover after removing the bolt(s).

ZMU05604

ZMU05625

5. Prepare the engine for starting. For further information, see page 31. Be sure that the gear shift is in neutral and that the engine stop switch lanyard lock plate is attached to the engine stop switch.

ZMU05611

Page 85

ZMU02026

Trouble Recovery

6. Insert the knotted end of the emergency starter rope into the notch in the flywheel rotor and wind the rope 1 or 2 turn(s) around the flywheel clockwise.

7. Pull the rope slowly until resistance is felt. Give a strong pull straight out to crank and start the engine. If the engine does not start on the first try, repeat the procedure.

ZMU05610

ZMU02334

NOTE:

●

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 31.

●

ZMU05533

Slowly return the throttle grip to the fully closed position so that the engine does not stall.

EMU32002

Emergency starting engine (electric start model)

1. Remove the top cowling.

2. Remove the dust cover.

Page 86

Trouble Recovery

ZMU05611

3. Remove the electrical system cover by removing its screw(s).

ZMU05612

4. Remove the screw(s) from the plate, and pull it down.

ZMU05624

5. Remove the starter/flywheel cover after removing the bolt(s).

ZMU05614

ZMU05615

ZMU05613

6. Secure the electrical system plate by tightening the bolt(s), and fix the plate.

Page 87

Trouble Recovery

ZMU05616

7. Prepare the engine for starting. For further information, see page 31. Be sure that the gear shift is in neutral and that the engine stop switch lanyard lock plate is attached to the engine stop switch. The main switch must be “” (on), if equipped.

ZMU02026

ZMU05533

8. Insert the knotted end of the emergency starter rope into the notch in the flywheel rotor and wind the rope 1 or 2 turn(s) around the flywheel clockwise.

9. Pull the rope slowly until resistance is felt. Give a strong pull straight out to crank and start the engine. If the engine does not start on the first try, repeat the procedure.

ZMU05622

Page 88

Trouble Recovery

NOTE:

●

Slowly return the throttle grip to the fully closed position so that the engine does not stall.

EMU29760

Treatment of submerged motor

If the outboard motor is submerged, immediately take it to a Yamaha dealer. Otherwise some corrosion may begin almost immediately. If you cannot immediately take the outboard motor to a Yamaha dealer, follow the procedure below in order to minimize engine damage.

EMU29783

Procedure

1. Thoroughly wash away mud, salt, seaweed, and so on, with fresh water.

2. Remove the spark plug(s), then face the spark plug holes downward to allow any water, mud, or contaminants to drain.

3. Drain the fuel from the carburetor, fuel filter, and fuel line. Drain the engine oil completely.

4. Fill the sump with the fresh engine oil.

rope.

6. Take the outboard motor to a Yamaha dealer as soon as possible.

ECM00400

CAUTION:

Do not attempt to run the outboard motor until it has been completely inspected.

Engine oil capacity:

1.6 L (1.69 US qt) (1.41 Imp.qt)

5. Feed engine fogging oil or engine oil through the carburetor(s) and spark plug holes while cranking the engine with the manual starter or emergency starter

Page 89

Consumer information

EMU29811

Important warranty information for U.S.A. and Canada

Page 90

Consumer information

Page 91

EMU29830

Consumer information

YAMAHA MOTOR CORPORATION, U.S.A.

FOUR-STROKE OUTBOARD MOTOR

THREE-YEAR LIMITED WARRANTY

Page 92

Consumer information

Page 93

Consumer information

EMU29841

IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR

YAMAHA OUTSIDE THE USA OR CANADA

Page 94

Page 95

Page 96

Printed in Japan April 2006–2.0 × 1 !

Printed on recycled paper

Page 97

YAMAHA MOTOR CO., LTD. MADE IN JAPAN PAYS D'ORIGINE JAPON

OUTBOARD MOTOR WARRANTY REGISTRATION

ENREGISTREMENT DE LA GARANTIE DU MOTEUR HORS-BORD

Please complete and mail this card. This information is necessary to accurately register your unit for warranty.

Veuillez signer ci-dessous pour attester que le montage et l’inspection ont été faits dans le respect des directives d’inspection et

OUTBOARD MOTOR MODEL AND SERIAL NUMBER (From I.D. label on clamp bracket)

MODÉLE ET NO. DE SÉRIE DU MOTEUR HORS-BORD (sur l’étiquette d’identification de la presse de fixation)

DATE SOLD

DATE DE LIVRAISON

OWNER’S NAME

NOM DU PROPRIÉTAIRE

ADDRESS

ADRESSE

PHONE NUMBER ( )

NUMÉRO DE TÉLÉPHONE

que la marche à suivre pour la garantie et l’entretien a été expliquée à l’acheteur au détail.

(For Dealer Use Only)

(A l’usage du concessionnaire)

YAMAHA DEALER NUMBER

NO. DU CONCESSIONNAIRE YAMAHA

DEALER NAME

NOM DU CONCESSIONNAIRE

USAGE (Check One)

UTILISATION

MONTH DAY YEAR

MOIS JOUR ANNÉE

FIRST LAST

PRÉNOM NOM DE FAMILLE

STREET

RUE

CITY STATE/PROVINCE ZIP

VILLE PROVINCE CODE POSTAL

(En cocher un.)

PLEASURE

LOISIR

COMMERCIAL

Page 98

ATTN: WARRANTY DEPARTMENT

PLACE POSTAGE HERE

Yamaha F15HP, F20HP User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Important manual information

Table of contents

Identification numbers record

Outboard motor serial number

General information

Emission control information

North American models

Key number

Star labels

Safety information

Important labels

Warning labels

Caution labels

Steering and sailing rules and sound signals

Rules when encountering vessels

Other special situations

Fueling instructions

Gasoline

Engine oil

Battery requirement

Battery specifications

Without a rectifier or Rectifier Regulator

Propeller selection

Start-in-gear protection

Basic components

Main components

Fuel tank

Fuel joint

Fuel gauge

Fuel tank cap

Air vent screw

Remote control

Remote control lever

Neutral interlock trigger

Tiller handle

Neutral throttle lever

Gear shift lever

Throttle grip

Throttle friction adjuster

Throttle indicator

Engine stop lanyard switch

Engine stop button

Manual starter handle

Main switch

Starter button

Power tilt switch

Steering friction adjuster

Steering friction adjuster

Trim tab

Trim rod (tilt pin)

Tilt lock mechanism

Tilt support knob

Tilt support bar

Power tilt unit

Top cowling lock lever (pull up type)

Flushing device

Warning indicator

Warning system

Overheat warning

Low oil pressure warning

Operation

Installation

Mounting the outboard motor

Clamping the outboard motor

Breaking in engine

Procedure for 4-stroke models

Preoperation checks

Fuel

Controls

Engine

Checking the engine oil level

Filling fuel

Ring Free Fuel Additive

Operating engine

Feeding fuel (portable tank)

Starting engine