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8A
User Manual
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Yamaha 8A User Manual

OWNER’S MANUAL
8A
U.S.A.Edition
LIT-18626-04-50
EMU01448
TO THE OWNER
In this Owner’s Manual particularly important information is distinguished in the following ways.
The Safety Alert Symbol means ATTENTION! BECOME ALERT!
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YOUR SAFETY IS INVOLVED!
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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 advance-
ments 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.
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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.
EMU01446*
OWNER'S MANUAL
©2001 by Yamaha Motor Corporation, USA
1st Edition, January 2001
All rights reserved.
Any reprinting or unauthorized use
without the written permission of
Yamaha Motor Corporation, USA
is expressly prohibited.
Printed in
P/N LIT-18626-04-50
NOTE:
The 8MHA and its standard accessories are used as a base for the explanations and illustrations in this manual. Therefore, some items may not apply to every model.
8A
Belgium
EMA20010

CONTENTS

E
GENERAL INFORMATION
BASIC COMPONENTS
OPERATION
MAINTENANCE
1
2
3
4
TROUBLE RECOVERY
INDEX
READ THIS OWNER’S MANUAL CAREFULLY
BEFORE OPERATING YOUR OUTBOARD MOTOR.
5
6
EMB00010
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Chapter 1
1
GENERAL
INFORMATION
IDENTIFICATION NUMBERS
RECORD ....................................................1-1
EMISSION CONTROL INFORMATION...1-2
SAFETY INFORMATION..........................1-3
IMPORTANT LABELS ..............................1-5
BASIC BOATING RULES .........................1-6
FUELING INSTRUCTIONS.....................1-10
Gasoline(petrol) ..................................1-11
Engine oil .............................................1-11
PROPELLER SELECTION .......................1-12
START-IN-GEAR PROTECTION ............1-13
2
3
4
5
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1
401012
M B K INDUSTRIE
PRODUCT ASSEMBLED IN FRANCE PRODUIT ASSEMBLE EN FRANCE
EMU00005
IDENTIFICATION NUMBERS
RECORD
EMU00007
OUTBOARD MOTOR SERIAL NUM­BER
The outboard motor serial number is stamped on the label attached to the port side of the clamp-bracket. Record your outboard motor serial num­ber in the spaces provided to assist you in ordering spare parts from your Yamaha dealer or for reference in case your out­board motor is stolen.
1 Outboard motor serial number
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EMISSION CONTROL INFORMATION
ENGINE FAMILY :
THIS ENGINE CONFORMS TO 2001 U.S. EPA REGULATIONS FOR MARINE SI ENGINES. FELs : SPARK PLUG :
IDLE SPEED :
rpm IN NEUTRAL
SPARK PLUG GAP (mm) :
g/kw-hr
Manufactured:
EMU01385
EMISSION CONTROL
INFORMATION
EMU01386
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.
Approval label of Emission control certificate
This label is attached to the bottom cowl­ing.
1 Emission control information label
Existing Technology ; N/A
Manufactured date label
This label is attached to the clamp bracket or the swivel bracket.
2 Manufactured date label
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EMU00917
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8 Before mounting or operating the out-
board motor, read this entire manual. Reading it should give you an under­standing of the motor and its operation.
8 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.
8 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.
8 Do not modify the outboard.
Modifications could make the motor unfit or unsafe to use.
8 Never operate after drinking alcohol or
taking drugs. About 50% of all boating fatalities involve intoxication.
8 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-swimmers should always wear PFDs, and everyone should wear PFDs when there are potentially haz­ardous boating conditions.
8 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.
SAFETY
INFORMATION
8 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.
8 Check throttle, shift, and steering for
proper operation before starting the engine.
8 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.
8 Know the marine laws and regulations
where you will be boating - and obey them. Refer to the “RULES OF THE ROAD” section for basic boating rules.
8 Stay informed about the weather.
Check weather forecasts before boating. Avoid boating in hazardous weather.
8 Tell someone where you are going:
leave a Float Plan with a responsible person. Be sure to cancel the Float Plan when you return.
8 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.
8 Always watch carefully for swimmers
during the engine operation.
8 Stay away from swimming areas. 8 When a swimmer is in the water near
you shift into neutral and shut off the engine.
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8 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
1-4
202013*
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EMB30010
WARNING
This engine is equipped with a neutral starting device. The engine will not start unless the shift control is in neutral position.
6E0-83627-41
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.
6A1-83625-41
8
8
8
IMPORTANT LABELS
WARNING LABELS
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EMB40010
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 you will be using your boat.
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 right­of-way is called the “give-way” or “bur- dened” 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 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.
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102045
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
(you are approaching another vessel head-on)
Crossing
(you are travelling across the other vessel’s path)
Overtaking
(you are passing or being passed by another vessel)
In the following illustration, your boat is in the center. You should give the right-of­way 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 Give-Way vessels). Both you and the meeting vessel must alter course to avoid each other.
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.
102044
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.
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-of-way! Both of you should alter course to avoid an accident. You should
102046
Overtaking
If you are passing another vessel, you are the “Give-Way” vessel. This means that the other vessel is expected to maintain
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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.
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 power-driven 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“fish- ing vessels” under the International Rules. Vessels with trolling lines are not considered fishing vessels. Fishing ves­sels have the right-of-way 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 power­driven 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.
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.
1-8
Remember, markings may vary by geo-
1
1
A
1
1
Proceeding toward head
of navigation from seaward
CAN BUOY
Odd number. Leave to port.
OR
SECONDARY CHANNEL BUOYS
STARTS NEW NUMBERING SYSTEM
old new
C " 1
"
NUN BUOY
Even number. Leave to starboard
N
"
2
"
No change
BUOY
COLOR CODE
BLACK
RED
GREEN
"
A
"
"
2
"
"
1
"
"
3
"
"
4
"
"
5
"
"
7
"
N
"
2
"
"
6
"
C
"
1
"
RB
"
L
"
RG
"
L
"
or
SECONDARY CHANNEL
MAIN CHANNEL
old
new
2
2
2
A
L
L
Odd number. increasing toward head of naviga-
MAIN CHANNEL BUOYS
"
1
" "
3
" "
5
" "
7
"
tion.Leave to port (left) proceeding upstream.
LIGHTED BUOY (Port Hand)`
White Light
Green Light
old
new
old
new
old
new
LIGHTED BUOY (Starboard Hand)`
"
2
" "
4
" "
6
"
Even number,increasing toward head of naviga­tion. Leave to starboard (right) proceeding up­stream.
White Light Red Light
"
A
"
LIGHTED SAFE WATER BUOY
No number. Marks midchannel, pass on either side. Letter has no lateral significance, used for
No number. Topmost band red
-
preferred
Top Mark White Light
White Light
OR
OR
LIGHTED PREFERRED CHANNEL TO
RB
"
L
"
RG
"
L
"
PORT BUOY
identification and location purposes.
channel is to left of buoy. Letter has no lateral significance, used for identification and location purposes.
Red Light
Red or White Light
OR
102052
graphic location. Always consult local boating authorities before driving your boat in unfamiliar waters.
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EMU00016
FUELING INSTRUCTIONS
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GASOLINE AND ITS VAPORS ARE HIGH­LY FLAMMABLE AND EXPLOSIVE! 8 Do not smoke when refueling, and
keep away from sparks, flames, or other sources of ignition.
8 Stop engine before refueling. 8 Refuel in a well-ventilated area. Refuel
portable fuel tanks off the boat.
8 Take care not to spill gasoline. If gaso-
line spills, wipe it up immediately with dry rags.
8 Do not overfill the fuel tank. 8 Tighten the filler cap securely after
refueling.
8 If you should swallow some gasoline
inhale a lot of gasoline vapor, or get gasoline in your eyes, get immediate medical attention.
8 If any gasoline spills onto your skin,
immediately wash with soap and water. Change clothing if gasoline spills on it.
8 Touch the fuel nozzle to the filler open-
ing or funnel to help prevent electrosta­tic sparks.
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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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EMU00018
GASOLINE (PETROL)
Recommended gasoline:
Regular unleaded gasoline with a minimum octane rating of 86 (Pump octane number) = (R+M)/2
If knocking or pinging occurs, use a differ­ent brand of gasoline or premium unlead­ed fuel. If unleaded gasoline is not avail­able, then leaded regular gasoline can be used.
EMU00027
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. Gasohol containing methanol is not recommended by Yamaha because it can cause fuel system damage or engine performance prob­lems.
EMU00858
ENGINE OIL
Recommended oil: YAMALUBE 2 STROKE OUTBOARD OIL
If the recommended engine oil is not available, another 2-stroke engine oil with a NMMA-certified TC-W3 rating may be used.
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EMU01395
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.
NOTE:
At full throttle and under a maximum boat load, the engine’s rpm should be within the upper half of the full throttle operating range, as listed in “SPECIFICA­TIONS” on page 4-1. Select a propeller which fulfills this requirement. If operating under conditions which allow the engine’s rpm to rise above the maxi­mum recommended range (such as light boat loads), reduce the throttle setting to maintain the rpm in the proper operating range.
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602013
9-1/4 x8 -N
123
1 Propeller diameter (in inches) 2 Propeller pitch (in inches) 3 Type of propeller (propeller mark)
Refer to the section “CHECKING PRO­PELLER” for instructions on propeller removal and installation.
EMU01209
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 Neutral. Always select Neutral before starting the engine.
1-13
EMC00010
Chapter 2

BASIC COMPONENTS

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MAIN COMPONENTS..............................2-1
OPERATIONS OF CONTROLS AND
OTHER FUNCTIONS ................................2-2
Fuel tank.................................................2-2
Gear shift lever ......................................2-2
Engine stop button ...............................2-3
Engine stop lanyard switch..................2-3
Throttle control grip..............................2-4
Choke knob ............................................2-4
Recoil starter handle.............................2-4
Tiller handle...........................................2-5
Throttle friction adjustment .................2-5
Steering friction adjustment ................2-6
Trim angle adjusting rod......................2-6
Sallow water lever ................................2-7
Tilt support knob...................................2-7
Top cowling lock lever..........................2-7
2
3
4
5
6
EMU01206
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!5
!6
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!0
!1
!2
!3
!4
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MAIN COMPONENTS
1 Recoil starter handle 2 Choke knob 3 Throttle control grip 4 Throttle friction adjustment 5 Engine stop button/
Engine stop lanyard switch
6 Clamp screw 7 Rope attachment 8 Cooling water inlet
9 Anti-cavitation plate 0 Trim angle adjusting rod q Shallow water lever w Tilt support knob e Gear shift-lever r Top cowling t Fuel tank y Fuel hose
* May not be exactly as shown; also may not
be included as standard equipment on all models.
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902065
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EMC20010
OPERATIONS OF CONTROLS
AND OTHER FUNCTIONS
EMC21012
FUEL TANK
If your model was equipped with a portable fuel tank, its function is as fol­lows.
1 Fuel hose joint 2 Fuel meter(If equipped) 3 Fuel tank cap 4 Air vent screw(If equipped)
Fuel hose joint
This connector is provided for connecting or disconnecting fuel hose.
Fuel meter
This meter is on the fuel tank cap. It shows current fuel quantity in the fuel tank approximately.
Fuel tank cap
This cap is for filling fuel. To remove it, turn it counterclockwise.
Air Vent screw
This screw is on the fuel tank cap. To loosen it, turn it counterclockwise.
EMC25010
GEAR SHIFT LEVER
qwe
310011
(for Tiller control model):
Turning the gear-shift lever towards you engages the clutch with the forward gear so that the boat moves ahead. Turning the lever away from you engages the reverse gear so that the boat moves astern.
1 Neutral 2 Forward 3 Reverse
2-2
308041
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EMC27011
ENGINE STOP BUTTON (for Tiller control model)
Pushing this button opens the ignition cir­cuit and stops the engine.
EMU00931
ENGINE STOP LANYARD SWITCH (for Tiller control model)
The lock-plate 1 must be attached to the engine stop lanyard switch for the engine to run. The lanyard 2 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.
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8 Attach the lanyard to a secure place on
your clothing, your arm or leg while operating.
8 Do not attach the lanyard to clothing
that could tear loose. Do not route the lanyard in such a way that it could become entangled, preventing it from functioning.
8 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.
NOTE:
The engine cannot be started with the lock-plate removed.
2-3
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503013
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EMC40010
THROTTLE CONTROL GRIP (for Tiller control model)
The throttle control grip is on the tiller handle. Turn the grip counterclockwise to increase speed and clockwise to decrease speed.
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.
1 Throttle indicatorx
EMC42110
CHOKE KNOB
Turning this knob to right (setting it to ON) supplies a rich mixture required to start the engine.
305014
EMC44010
RECOIL STARTER HANDLE (If equipped)
209015
2-4
503015
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EMC60010
TILLER HANDLE (for Tiller control model)
Moving the tiller handle sideways to adjust the steering direction.
EMC64010
THROTTLE FRICTION ADJUSTMENT (for Tiller control model)
A friction device in the tiller handle pro­vides resistance to movement of the throttle grip. This is adjustable for opera­tor preference. An adjusting screw/bolt is located within the tiller handle.
To increase the resistance: Turn the adjusting screw/bolt clockwise. To decrease the resistance: Turn the adjusting screw/bolt counter­clockwise.
When constant speed is desired, tighten the adjusting screw/bolt to maintain the desired throttle setting.
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Do not overtighten the friction adjusting screw/bolt. If there is too much resis­tance, it may be difficult to move the throttle grip, which could result in an accident.
2-5
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408011
EMD00010
STEERING FRICTION ADJUSTMENT (for Tiller control model)
A friction device provides resistance to steering movement. This is adjustable for operator preference. An adjusting screw/bolt is located on the swivel bracket.
To increase the resistance: Turn the adjusting screw/bolt clockwise.
To decrease the resistance: Turn the adjusting screw/bolt counter­clockwise.
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Do not overtighten the friction screw/bolt. If there is too much resis­tance, it may be difficult to steer, which could result in an accident.
EMU01297
TRIM ANGLE ADJUSTING ROD
The position of the trim angle adjusting rod determines the minimum trim angle of the outboard motor in relation to the transom.
404032*
2-6
403022
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412011*
301036*
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EMD08110
SHALLOW WATER LEVER (If equipped)
Pushing this lever down will tilt the motor up partially to provide more clearance when operating in shallow water.
EMD47010
TILT SUPPORT KNOB
To keep the outboard motor in the tilted­up position, push the tilt support knob under the swivel bracket.
EMD62011
TOP COWLING LOCK LEVER
To remove the engine top cowling, turn the lock lever. Then lift off the cowling. When replacing the cowling, check to be sure it fits properly in the rubber seal. Then lock the cowling again by moving the lever upward.
1 Top cowling lock lever
2-7
EMF00010
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Chapter 3
1

OPERATION

INSTALLATION ........................................3-1
Mounting the outboard motor ............3-2
Clamping the outboard motor.............3-4
FILLING FUEL AND ENGINE OIL ............3-5
Filling fuel ..............................................3-5
Gasoline (petrol) and oil mixing..........3-6
PRE-OPERATION CHECKS ......................3-7
BREAKING IN (RUNNING IN)
ENGINE .....................................................3-8
STARTING ENGINE ...............................3-10
WARMING UP ENGINE .........................3-13
SHIFTING ................................................3-14
Forward................................................3-14
Reverse ................................................3-14
STOPPING ENGINE ...............................3-15
TRIMMING OUTBOARD MOTOR.........3-16
Adjusting trim angle ...........................3-17
CRUISING IN SHALLOW WATER.........3-19
TILTING UP/DOWN ...............................3-21
2
3
4
5
CRUISING IN OTHER CONDITIONS.....3-23
Cruising in salt water..........................3-23
Cruising in turbid water .....................3-23
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EMF10010
INSTALLATION
cC
Incorrect engine height or obstructions to smooth water flow (such as the design or condition of the boat or acce- ssories such as transom ladders/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.
3-1
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