Yamaha 3A User Manual

OWNER’S MANUAL

6L5-28199-72-E0

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

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!

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WARNING

Failure to follow WARNING instructions could result in severe injury or death to 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.

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 manual, please consult your Yamaha dealer.

To ensure long product life, Yamaha recommends that you use the product and perform the specified periodic inspections and maintenance by correctly following the instructions in the owner’s manual. Note that if you do not follow these instructions, not only may the product break down, but the warranty will also be voided.

Some countries have laws or regulations restricting users from taking the product out of the country where it was purchased, and it may be impossible to register the product in the destination country. Additionally, the warranty may not apply in certain regions. When planning to take the product to another country, consult the dealer where the product was purchased for further information.

If the product was purchased used, please consult your closest dealer for customer reregistration, and to be eligible for the specified services.

NOTE:

The 3AMH 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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3A OWNER’S MANUAL

Any reprinting or unauthorized use without the written permission of Yamaha Motor Co., Ltd.

is expressly prohibited. Printed in Japan

General information ..........................	1
Identification numbers record ..........	1
Outboard motor serial number ...........	1
EC label...........................................	1
Safety information ...........................	1
Important labels...............................	3
Warning labels....................................	3
Fueling instructions .........................	3
Gasoline .............................................	3
Engine oil............................................	3
Propeller selection...........................	4
Basic components ............................	5
Main components............................	5
Fuel tank.............................................	5
Fuel tank cap......................................	6
Air vent screw.....................................	6
Fuel cock ............................................	6
Tiller handle........................................	6
Gear shift lever ...................................	7
Throttle grip ........................................	7
Throttle indicator.................................	7
Throttle friction adjuster......................	7
Engine stop button .............................	8
Choke knob for pull type.....................	8
Manual starter handle.........................	8
Steering friction adjuster.....................	8
Trim rod (tilt pin) .................................	8
Tilt support bar ...................................	9
Top cowling lock lever
(pull up type) ...................................	9
Carrying handle ..................................	9
Operation .........................................	10
Installation .....................................	10
Mounting the outboard motor ...........	10
Clamping the outboard motor...........	11
Breaking in engine ........................	12
Gasoline and engine oil mixing
chart (50:1)....................................	12
Procedure for pre-mixed models ......	12
Preoperation checks .....................	13

Oil .....................................................	13
Controls ............................................	13
Engine ..............................................	13
Filling fuel and engine oil ..............	13
Filling fuel for built-in tank.................	13
Gasoline and oil mixing (100:1) ........	13
Operating engine ..........................	14
Feeding fuel......................................	14
Starting engine .................................	15
Warming up engine.......................	16
Choke start models ..........................	16
Shifting ..........................................	17
Forward (tiller handle and
remote control models) .................	17
Reverse ............................................	17
Stopping engine ............................	18
Procedure.........................................	18
Trimming outboard motor..............	19
Adjusting trim angle for manual tilt
models ..........................................	19
Adjusting boat trim............................	20
Tilting up and down.......................	21
Procedure for tilting up
(manual tilt models).......................	21
Procedure for tilting down
(manual tilt models).......................	22
Cruising in shallow water ..............	22
Cruising in shallow water
(manual tilt models).......................	22
Cruising in other conditions...........	23
Maintenance ....................................	25
Specifications................................	25
Transporting and storing outboard
motor..........................................	25
Clamp screw mounting models ........	26
Storing outboard motor.....................	26
Procedure.........................................	27
Lubrication
(except oil injection models)..........	28
Cleaning the outboard motor ............	28
Checking painted surface of motor...	28

Fuel ..................................................

Table of contents

Periodic maintenance....................	28
Replacement parts ...........................	28
Maintenance chart............................	29
Greasing...........................................	30
Cleaning and adjusting spark plug ...	30
Checking fuel system .......................	31
Inspecting idling speed.....................	32
Checking wiring and connectors ......	32
Exhaust leakage...............................	32
Water leakage ..................................	32
Checking propeller ...........................	32
Removing the propeller ....................	33
Installing the Propeller......................	33
Changing gear oil .............................	34
Inspecting and replacing anode(s) ...	35
Checking top cowling .......................	35
Coating the boat bottom ...................	35
Trouble Recovery ............................	37
Troubleshooting ............................	37
Temporary action in emergency....	40
Impact damage.................................	40
Starter will not operate .....................	40
Emergency starting engine...............	41
Treatment of submerged motor.....	42
Procedure.........................................	42

General information

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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 sto-

1. EC label location

len.

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1. Outboard motor serial number location	EMU25371

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EC label

Engines affixed with this label conform to certain portions of the European Parliament directive relating to machinery. Refer to the label and the EC Declaration of Conformity for more details.

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 owner’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 outboard motor. Overpowering the boat could result in loss of control. The rated power of 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.

General information

●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.

●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 non-swim- mers should always wear PFDs, and everyone should wear PFDs when there are potentially hazardous boating conditions.

●Gasoline is highly flammable, and its vapors 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 proper operation before starting the engine.

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

●Know the marine laws and regulations where you will be boating - and obey them.

●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 during the engine operation.

●Stay away from swimming areas.

●When a swimmer is in the water near you 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 dealer on discarding the product.

General information

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Important labels

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Warning labels

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Label

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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

EWM01311

WARNING

LEAKING FUEL COULD CAUSE A FIRE. Before tilting up the engine or laying it on its side:

●Turn the fuel cock to the “closed” position.

●Tighten the air-vent screw on the fuel tank cap.

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Fueling instructions

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WARNING

GASOLINE AND ITS VAPORS ARE HIGHLY FLAMMABLE AND EXPLOSIVE!

●Do not smoke when refueling, and keep away from sparks, flames, or other sources of ignition.

●Stop engine before refueling.

●Refuel in a well-ventilated area.

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

●Do not overfill the fuel tank.

●Tighten the filler cap securely after refueling.

●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, immediately wash with soap and water. Change clothing if gasoline spills on it.

●Touch the fuel nozzle to the filler opening 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.

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Gasoline

Recommended gasoline:

Regular unleaded gasoline with a minimum octane rating of 90 (Research Octane Number).

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

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Engine oil

Recommended engine oil: YAMALUBE 2-stroke outboard motor oil

General information

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

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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.

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 32.

x- 1 2 3

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1.Propeller diameter in inches

2.Propeller pitch in inches

3.Type of propeller (propeller mark)

Basic components

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Main components

NOTE:

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

1.Air vent screw

2.Fuel tank cap

3.Manual starter handle

4.Choke knob

5.Engine stop button

6.Top cowling lock lever

7.Tiller handle

8.Throttle friction adjuster

9.Carrying handle 10.Clamp screw 11.Trim rod 12.Cooling water inlet 13.Propeller 14.Anti-cavitation plate 15.Clamp bracket 16.Tilt support lever

17.Rope attachment 18.Fuel cock 19.Gear shift lever 20.Top cowling

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Fuel tank

If your model included a fuel tank, its parts and functions are as follows.

Basic components

1.Air vent screw

2.Fuel tank cap

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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.

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Air vent screw

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

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Fuel cock

The fuel cock turns on and off the supply of fuel from the fuel tank to the engine.

1. Fuel cock

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To stop fuel flow to the engine, turn the lever or knob to close position.

Always turn the lever or knob to close position when the engine is not running.

1. Close position

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Open

With the lever/knob in this position, fuel flows to the carburetor.

Normal running is done with the lever/knob in this position.

1. Open position

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Tiller handle

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

Basic components

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Gear shift lever

Pulling the gear shift lever towards you puts the engine in forward gear so that the boat moves ahead.

1.Neutral “”

2.Forward “”

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Throttle grip

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

1. Throttle indicator

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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.

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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.

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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.

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

Basic components

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Engine stop button

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

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Choke knob for pull type

To supply the engine with the rich fuel mixture required to start, pull out this knob.

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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.

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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.

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.

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Trim rod (tilt pin)

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

Basic components

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Carrying handle

A carrying handle is included on the swivel bracket. It enables you to carry the outboard motor easily with one hand.

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Tilt support bar

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

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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.

Operation

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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.

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Mounting the outboard motor

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WARNING

●Overpowering a boat could cause severe 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.

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

1 ZMU01760

1. Center line (keel line)

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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

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