Yamaha F2.5MSH v6 Owner's Manual
en
F2.5
OWNERS MANUAL
LIT-18626-07-04 69M-F8199-15
U.S.A.Edition
ZMU01690
Read this owners manual carefully before operating your outboard motor.
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Important manual information EMU31280
To the owner Thank you for choosing a Yamaha outboard motor. This Owners Manual contains infor- mation needed for proper operation, mainte- nance 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 Owners Manual particularly important information is distinguished in the following ways.
The Safety Alert Symbol means AT- TENTION! BECOME ALERT! YOUR SAFE- TY IS INVOLVED!
WARNING EWM00780
Failure to follow WARNING instructions could result in severe injury or death to the machine operator, a bystander, or a per- son inspecting or repairing the outboard motor.
CAUTION: ECM00700
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 con- sult your Yamaha dealer.
NOTE: The F2.5MH 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.
EMU25130
F2.5 OWNERS MANUAL
2006 by Yamaha Motor Corporation, USA
1st Edition, January 2006 All rights reserved.
Any reprinting or unauthorized use without the written permission of Yamaha Motor Corporation, USA
is expressly prohibited. Printed in France
P/N LIT-18626-07-04
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Table of contents
General information ..........................1 Identification numbers record.......... 1
Outboard motor serial 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 .................................. 5 Rules when encountering vessels...... 6 Other special situations ...................... 7
Fueling instructions ......................... 9 Gasoline ............................................. 9 Engine oil............................................ 9
Propeller selection......................... 10
Basic components ..........................11 Main components.......................... 11
Fuel tank........................................... 11 Fuel tank cap.................................... 12 Air vent screw................................... 12 Fuel cock .......................................... 12 Tiller handle...................................... 12 Gear shift lever ................................. 13 Throttle grip ...................................... 13 Throttle indicator............................... 13 Throttle friction adjuster.................... 13 Engine stop lanyard switch............... 14 Engine stop button ........................... 14 Choke knob for pull type................... 14 Manual starter handle....................... 14 Steering friction adjuster................... 15 Trim rod (tilt pin) ............................... 15 Tilt support lever for manual tilt
model ............................................ 15 Top cowling lock lever
(pull up type) ................................. 15 Carrying handle ................................ 16
Operation ......................................... 17 Installation..................................... 17
Mounting the outboard motor ........... 17 Clamping the outboard motor ........... 18
Breaking in engine ........................ 19 Procedure for 4-stroke models ......... 19
Preoperation checks ..................... 19 Fuel .................................................. 19 Controls ............................................ 19 Engine .............................................. 19 Checking the engine oil level............ 19
Filling fuel for built-in tank ............. 20 Ring Free Fuel Additive.................... 20
Operating engine .......................... 21 Feeding fuel...................................... 21 Starting engine ................................. 21
Warming up engine....................... 23 Manual start models ......................... 23
Shifting .......................................... 23 Forward (tiller handle and
remote control models) ................. 23 Reverse ............................................ 24
Stopping engine............................ 25 Procedure......................................... 25
Trimming outboard motor.............. 25 Adjusting trim angle for manual tilt
models .......................................... 26 Adjusting boat trim............................ 26
Tilting up and down....................... 27 Procedure for tilting up
(manual tilt models)....................... 28 Procedure for tilting down
(manual tilt models)....................... 29
Maintenance .................................... 30 Specifications................................ 30 Transporting and storing
outboard motor .......................... 31 Clamp screw mounting models ........ 31 Storing outboard motor..................... 32 Procedure......................................... 32 Lubrication
(except oil injection models).......... 33
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Table of contents
Cleaning and anticorrosion measures ...................................... 33
Cleaning the outboard motor............ 33 Checking painted surface of motor... 34
Periodic maintenance.................... 34 Replacement parts ........................... 34 Maintenance chart............................ 35 Maintenance chart (additional) ......... 36 Greasing........................................... 36 Cleaning and adjusting spark plug ... 36 Checking fuel system ....................... 37 Inspecting idling speed..................... 38 Changing engine oil.......................... 38 Checking wiring and connectors ...... 40 Exhaust leakage............................... 40 Water leakage .................................. 40 Engine oil leakage ............................ 40 Checking propeller ........................... 40 Removing the propeller .................... 41 Installing the Propeller...................... 41 Changing gear oil ............................. 42 Inspecting and replacing anode(s) ... 43 Checking top cowling ....................... 43 Coating the boat bottom................... 43
Trouble Recovery............................ 45 Troubleshooting ............................ 45 Temporary action in emergency.... 48
Impact damage................................. 48 Starter will not operate ..................... 48 Emergency Starting Engine.............. 49
Treatment of submerged motor..... 51 Procedure......................................... 51
Consumer information ................... 52 Important warranty information for
U.S.A. and Canada.................... 52 YAMAHA MOTOR
CORPORATION, U.S.A. FOUR-STROKE OUTBOARD MOTOR THREE-YEAR LIMITED WARRANTY ............... 54
IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE THE USA OR CANADA............. 56
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General information
1
EMU25170
Identification numbers record EMU25183
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- len.
EMU25221
Emission control information EMU25230
North American models This engine conforms to U.S. Environmental Protection Agency (EPA) regulations for ma- rine SI engines. See the label affixed to your engine for details.
EMU25242
Approval label of emission control certifi- cate This label is attached to the bottom cowling. New Technology; (4-stroke/HPDI) EM
EMU25262
Manufactured date label This label is attached to the clamp bracket or the swivel bracket.
1. Outboard motor serial number location
1. Approval label location
1. Manufactured date label location
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General information
2
EMU25272
Star labels Your outboard motor is labeled with a Califor- nia Air Resources Board (CARB) star label. See below for a description of your particular label.
EMU25280
One StarLow Emission The one-star label identifies engines that meet the Air Resources Boards 2001 ex- haust emission standards. Engines meeting these standards have 75% lower emissions than conventional carbureted two-stroke en- gines. These engines are equivalent to the U.S. EPAs 2006 standards for marine en- gines.
EMU25290
Two StarsVery Low Emission The two-star label identifies engines that meet the Air Resources Boards 2004 exhaust emission standards. Engines meeting these standards have 20% lower emissions than One Star-Low-Emission engines.
EMU25300
Three StarsUltra Low Emission The three-star label identifies engines that meet the Air Resources Boards 2008 ex- haust emission standards. Engines meeting these standards have 65% lower emissions than One Star-Low-Emission engines.
1. Star labels location
Manufactured:
ZMU04346 ZMU01702
ZMU01703
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General information
3
EMU25362
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- ers or operators 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 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 man- ufacturer.
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 tak- ing 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 boat-
ing. At a minimum, children and non-swim- mers should always wear PFDs, and everyone should wear PFDs when there are potentially hazardous boating condi- tions.
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 be- fore starting the engine.
This product emits exhaust gases which contain carbon monoxide, a colorless, odorless gas which may cause brain dam- age or death when inhaled. Symptoms in- clude nausea, dizziness, and drowsiness. Keep cockpit and cabin areas well ventilat- ed. Avoid blocking exhaust outlets.
Check throttle, shift, and steering for proper 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 acciden- tally leave the helm, the cord will pull from the switch, stopping the engine.
Know the marine laws and regulations where you will be boatingand 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 re- turn.
Use common sense and good judgment when boating. Know your abilities, and be sure you understand how your boat han- dles under the different boating conditions you may encounter. Operate within your
ZMU01704
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General information
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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 cor- rect processing of empty containers, con- sult 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 us- ing a funnel or similar device. If necessary, verify the necessary replacement proce- dure 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 follow- ing: United States Coast Guard Consumer Affairs Staff (G-BC) Office of Boating, Public, and Consumer Af- fairs U.S. Coast Guard Headquarters Washington, D.C. 20593-0001 Boating Safety Hotline: 1-800-368-5647 National Marine Manufacturers Associa- tion (NMMA) 401 N. Michigan Ave. Chicago, Il 60611 Marine Retailers Association of America 155 N. Michigan Ave. Chicago, Il 60601
EMU25382
Important labels EMU25395
Warning labels
EMU25401
Label
WARNING EWM01260
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.
EMU25441
Label
WARNING EWM01311
LEAKING FUEL COULD CAUSE A FIRE. Before tilting up the engine or laying it on its side:
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General information
5
Turn the fuel cock to the closed posi- tion.
Tighten the air-vent screw on the fuel tank cap.
EMU25465
Caution labels
EMU25482
Label
CAUTION: ECM01201
Store the engine only as shown. Otherwise, engine damage could result from leaking oil.
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 inter- nationally, and are also enforced by the Unit-
ed States Coast Guard and local agencies. You should be aware of these rules, and fol- low them whenever you encounter another vessel on the water. Several sets of rules prevail according to geo- graphic location, but are all basically the same as the International Rules of the Road. The rules presented here in your Owners 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 us- ing your boat. EMU25510
Steering and sailing rules and sound signals Whenever two vessels on the water meet one another, one vessel has the right-of-way; 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 main- tain 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-of- way 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 al- ways move in such a way that the operator of the other vessel can see what you are doing.
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General information
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The general prudential rule This rule is called Rule 2 in the International Rules and says, In obeying and construing these rules due re- gard shall be had to all dangers of navigation and collision, and to any special circumstanc- es, which may render a departure from the above rules necessary in order to avoid im- mediate danger. In other words, follow the standard rules ex- cept when a collision will occur unless both vessels try to avoid each other. If that is the case, both vessels become Give-Way ves- sels. 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: (you are approaching another ves- sel head-on) Crossing: (you are traveling across the other vessels 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-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 Give-Way 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 col- lision, neither of you has the right-of-way! Both of you should alter course to avoid an ac- cident. You should keep the other vessel on your port (left) side. This rule doesnt apply if both of you will clear one another if you con- tinue on your set course and speed.
Crossing When two power driven vessels are crossing each others 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, provid- ed the other vessel gives you the right-of-way as it should.
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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. 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 power- driven vessel is preparing to go around a bend that may obstruct the view of other water vessels, the operator should sound a pro- longed 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 pro- ceed around the bend with caution. If you nav- igate 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 ves- sels. Fishing vessels have the right-of-way re- gardless of position. Fishing vessels cannot, however, impede the passage of other ves- sels 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.
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, num- bers 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 be- ing 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 navi- gating out of port, your position with respect to the buoys should be reversed; red buoys should be to port and black buoys to star- board. Many bodies of water used by boaters are en- tirely within the boundaries of a particular state. The Uniform State Waterway Marking
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System has been devised for these waters. This system uses buoys and signs with dis- tinctive 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 geograph- ic location. Always consult local boating au- thorities before driving your boat in unfamiliar waters.
ZMU01708
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EMU31490
Fueling instructions
WARNING EWM01490
GASOLINE AND ITS VAPORS ARE HIGH- LY 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 gaso-
line spills, wipe it up immediately with dry rags.
Do not overfill the fuel tank. Tighten the filler cap securely after refu-
eling. If you should swallow some gasoline, in-
hale a lot of gasoline vapor, or get gaso- line 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 electrostat- ic sparks.
CAUTION: ECM00010
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.
Gasohol There are two types of gasohol: gasohol con- taining 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. EMU31440
Engine oil
NOTE: If the recommended engine oil grades are not available, select an alternative from the fol- lowing chart according to the average temper- atures in your area.
Recommended gasoline: Regular unleaded gasoline with a mini- mum octane rating of 86 (Pump Oc- tane Number) = (R+M)/2
Recommended engine oil: YAMALUBE 4-M FC-W oil or 4-stroke motor oil with a combination of the fol- lowing 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): 0.35 L (0.37 US qt) (0.31 Imp.qt)
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CAUTION: ECM01050
All 4-stroke engines are shipped from the factory without engine oil.
EMU25742
Propeller selection The performance of your outboard motor will be critically affected by your choice of propel- ler, as an incorrect choice could adversely af- fect 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 pro- pellers 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 main- tained. 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 appli- cation.
NOTE: Select a propeller which will allow the engine to reach the middle or upper half of the oper- ating 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, re- duce the throttle setting to maintain the en- gine in the proper operating range.
For instructions on propeller removal and in- stallation, see page 40.
ZMU01710
1. Propeller diameter in inches 2. Propeller pitch in inches 3. Type of propeller (propeller mark)
ZMU04604
-x 1 2 3
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Basic components
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EMU25797
Main components
NOTE: * May not be exactly as shown; also may not be included as standard equipment on all models.
EMU25821
Fuel tank If your model included a fuel tank, its parts and functions are as follows.
1. Top cowling 2. Top cowling lock lever 3. Carrying handle 4. Steering friction screw 5. Anti-cavitation plate 6. Propeller 7. Cooling water inlet 8. Trim rod 9. Clamp bracket 10.Tiller handle 11.Air vent screw 12.Fuel tank cap 13.Manual starter handle 14.Engine stop button/Engine stop lanyard
switch 15.Clamp screw 16.Rope attachment
17.Gear shift lever 18.Choke knob
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Basic components
12
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. EMU25872
Fuel cock The fuel cock turns on and off the supply of fuel from the fuel tank to the engine.
EMU25881
Close 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.
EMU25891
Open With the lever/knob in this position, fuel flows to the carburetor. Normal running is done with the lever/knob in this position.
EMU25911
Tiller handle To change direction, move the tiller handle to the left or right as necessary.
1. Fuel tank cap 2. Air vent screw
1. Fuel cock
1. Close position
1. Open position
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Basic components
13
EMU25930
Gear shift lever Pulling the gear shift lever towards you puts the engine in forward gear so that the boat moves ahead.
EMU25941
Throttle grip The throttle grip is on the tiller handle. Turn the grip counterclockwise to increase speed and clockwise to decrease speed.
EMU25961
Throttle indicator The fuel consumption curve on the throttle in- dicator shows the relative amount of fuel con- sumed for each throttle position. Choose the setting that offers the best performance and fuel economy for the desired operation.
EMU25971
Throttle friction adjuster A friction device provides adjustable resis- tance to movement of the throttle grip or the remote control lever, and can be set accord- ing to operator preference. To increase resistance, turn the adjuster clockwise. To decrease resistance, turn the adjuster counterclockwise.
WARNING EWM00031
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.
When constant speed is desired, tighten the adjuster to maintain the desired throttle set- ting.
1. Forward 2. Neutral
1. Throttle indicator
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14
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 operators clothing, or arm or leg. Should the operator fall overboard or leave the helm, the lanyard will pull out the lock plate, stopping ig- nition to the engine. This will prevent the boat from running away under power.
WARNING EWM00120
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- gled, 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.
NOTE: The engine cannot be started with the lock plate removed.
EMU26001
Engine stop button To open the ignition circuit and stop the en- gine, push this button.
EMU26011
Choke knob for pull type To supply the engine with the rich fuel mixture required to start, pull out this knob.
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.
1. Lock plate 2. Lanyard
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15
EMU26122
Steering friction adjuster A friction device provides adjustable resis- tance to the steering mechanism, and can be set according to operator preference. An ad- justing screw or bolt is located on the swivel bracket.
To increase resistance, turn the adjuster clockwise. To decrease resistance, turn the adjuster counterclockwise.
WARNING EWM00040
Do not overtighten the friction adjuster. If there is too much resistance, it could be difficult to steer, which could result in an accident.
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.
EMU30200
Tilt support lever for manual tilt model To keep the outboard motor in the tilted up po- sition, lock the tilt support lever to the clamp bracket.
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 in- stalling the cowling, check to be sure it fits properly in the rubber seal. Then lock the cowling by moving the lever(s) downward.
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16
EMU26450
Carrying handle A carrying handle is provided on the rear of the outboard motor. It enables you to carry the outboard motor easily with one hand.
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Operation
17
EMU26901
Installation
CAUTION: ECM00110
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 trans- ducers) can create airborne water spray while the boat is cruising. Severe engine damage may result if the motor is operat- ed continuously in the presence of air- borne 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 ex- haust housing is low enough to prevent water entry into the powerhead, when water rises due to waves when the outboard is not run- ning.
EMU26910
Mounting the outboard motor
WARNING EWM00820
Overpowering a boat could cause se- vere instability. Do not install an out- board 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 sec- tion is intended as reference only. It is not possible to provide complete in- structions for every possible boat and motor combination. Proper mounting depends in part on experience and the specific boat and motor combination.
WARNING EWM00830
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 oth- er person experienced in proper out- board 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.
EMU26920
Mounting height To run your boat at optimum efficiency, the water resistance (drag) of the boat and out- board motor must be made as little as possi- ble. The mounting height of the outboard motor greatly affects the water resistance. If the mounting height is too high, cavitation
1. Center line (keel line)
ZMU017601
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tends to occur, thus reducing the propulsion; and if the propeller tips cut the air, the engine speed will rise abnormally and cause the en- gine 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.
NOTE: The optimum mounting height of the out-
board motor is affected by the boat and mo- tor 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 prop- er mounting height.
For instructions on setting the trim angle of the outboard motor, see page 25.
EMU26970
Clamping the outboard motor 1. Place the outboard motor on the transom
so that it is positioned as close to the cen- ter as possible. Tighten the transom clamp screws evenly and securely. Oc- casionally check the clamp screws for tightness during operation of the out- board motor because they could become loose due to engine vibration.
WARNING EWM00640
Loose clamp screws could allow the out- board motor to fall off or move on the tran- som. This could cause loss of control and serious injury. Make sure the transom screws are tightened securely. Occasion- ally check the screws for tightness during operation.
2. If the engine restraint cable attachment is equipped on your engine, an engine re- straint cable or chain should be used. At- tach 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.
3. Secure the clamp bracket to the transom using the bolts provided with the out- board (if packed). For details, consult your Yamaha dealer.
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WARNING EWM00650
Avoid using bolts, nuts or washers other than those contained in the engine pack- aging. If used, they must be of at least the same quality of material and strength and must be tightened securely. After tighten- ing, test run the engine and check their tightness.
EMU30173
Breaking in engine Your new engine requires a period of break-in to allow mating surfaces of moving parts to wear in evenly. Correct break-in will help en- sure proper performance and longer engine life.
CAUTION: ECM00800
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 pro- peller installed) for 10 hours as follows. 1. First hour:
Run the engine at 2000 r/min or at ap- proximately half throttle.
2. Second hour: Run the engine at 3000 r/min or at ap- proximately 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.
EMU27102
Preoperation checks
WARNING EWM00080
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.
CAUTION: ECM00120
Do not start the engine out of water. Over- heating and serious engine damage can occur.
EMU31500
Fuel Check to be sure you have plenty of fuel for
your trip. Make sure there are no fuel leaks or gaso-
line fumes. EMU27130
Controls Check throttle, shift, and steering for proper
operation before starting the engine. The controls should work smoothly, without
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. Look for loose or damaged fasteners. Check the propeller for damage. EMU30212
Checking the engine oil level 1. Put the outboard motor in an upright po-
sition (not tilted). 2. Check the oil level using the oil level
check window to be sure the level falls between the upper and lower marks. Fill
U69M15E0.book Page 19 Wednesday, April 5, 2006 4:48 PM
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20
with oil if it is below the lower mark, or drain to the specified level if it is above the upper mark.
EMU30850
Filling fuel for built-in tank
WARNING EWM00060
Gasoline and its vapors are highly flam- mable and explosive. Keep away from sparks, cigarettes, flames, or other sourc- es of ignition.
1. With the outboard motor tilted down (in the vertical running position), remove the fuel tank cap.
2. Use a funnel if the nozzle on the fuel can or pump is not small enough or long enough to fit into the mouth of the fuel tank.
3. Fill the fuel tank carefully. 4. Securely close the cap after refueling.
Wipe up any spilled fuel.
EMU27270
Ring Free Fuel Additive Gasoline is a precise blend of many different substances, each chosen to give certain char- acteristics. Gasoline blends have been changing in recent years in response to con- cerns about pollution and resulting emissions regulations. One of the most obvious changes has been the elimination of lead from most fu- els. As gasoline has changed, the amount of addi- tives such as aromatics and oxygenates 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 combus- tion chamber. When enough deposits collect, piston rings begin sticking. Performance drops and engine wear increases dramatical- ly. While many additives available may reduce deposits, Yamaha recommends the use of Ring Free Fuel Additive, available from your Yamaha dealer. Ring Free Fuel Additive has repeatedly proven its ability to clean com- bustion deposits from inside the engine, nota- bly the critical piston-ring-land area, and fuel system components. Follow product labeling for use instructions.
1. Oil level check window
1. Lower level mark 2. Upper level mark
Fuel tank capacity: 0.9 L (0.24 US gal) (0.20 Imp.gal)
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21
EMU27450
Operating engine EMU31510
Feeding fuel
WARNING EWM00420
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. Gaso- line 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, <