Yamaha F2.5SMHA v3 Owner's Manual
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Read this manual carefully before operating this outboard motor.
OWNERS MANUAL
F2.5 F4 F6
LIT-18626-09-62 6BV-F8199-36-E0
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ZMU07696
Les gaz dchappement du moteur de ce produit contiennent des substances chimiques connues dans ltat de Californie pour provoquer le cancer, des anomalies congnitales et des troubles de la reproduction.
Read this manual carefully before operating this outboard motor. Keep this manual onboard in a waterproof bag when boating. This manual should stay with the outboard motor if it is sold.
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Important manual information EMU44140
To the owner Thank you for selecting 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.
: This is the safety alert symbol. It is used to alert you to potential personal injury haz- ards. Obey all safety messages that follow this symbol to avoid possible injury or death.
WARNING EWM00781
A WARNING indicates a hazardous situa- tion which, if not avoided, could result in death or serious injury.
NOTICE ECM00701
A NOTICE indicates special precautions that must be taken to avoid damage to the outboard motor or other property.
TIP: A TIP provides key information to make pro- cedures 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. To ensure long product life, Yamaha recom- mends that you use the product and perform the specified periodic inspections and mainte- nance by correctly following the instructions in the owners manual. Any damage resulting from neglect of these instructions is not cov- ered by warranty. Some countries have laws or regulations re- stricting 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 war- ranty may not apply in certain regions. When planning to take the product to another coun- try, consult the dealer where the product was purchased for further information. If you purchased this outboard motor used, see your Yamaha dealer to have it registered in your name in Yamaha records.
TIP: The F2.5MHA, F4MHA, F6MHA and the stan- dard accessories are used as a base for the explanations and illustrations in this manual. Therefore some items may not apply to every model. EMU44200
F2.5, F4, F6 OWNERS MANUAL
2012 by Yamaha Motor Co., Ltd. 1st Edition, March 2012
All rights reserved. Any reprinting or unauthorized use without the written permission of
Yamaha Motor Co., Ltd. is expressly prohibited.
Printed in France
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Table of contents
Safety information.............................1 Outboard motor safety .................... 1
Propeller ............................................. 1 Rotating parts ..................................... 1 Hot parts............................................. 1 Electric shock ..................................... 1 Engine shut-off cord (lanyard) ............ 1 Gasoline ............................................. 1 Gasoline exposure and spills ............. 1 Carbon monoxide ............................... 1 Modifications ...................................... 2
Boating safety ................................. 2 Alcohol and drugs............................... 2 Personal flotation devices .................. 2 People in the water............................. 2 Passengers ........................................ 2 Overloading ........................................ 2 Avoid collisions................................... 2 Weather.............................................. 3 Accident reporting .............................. 3 Boat education and training................ 3 Passenger training ............................. 3 Boating safety publications................. 3 Laws and regulations ......................... 4
Boating organizations...................... 4 Basic boating rules
(Rules of the road) ....................... 4 Steering and sailing rules and sound
signals............................................. 4 Rules when encountering vessels...... 5 Other special situations ...................... 6
General information ..........................9 Identification numbers record.......... 9
Outboard motor serial number ........... 9 Read manuals and labels.............. 10
Warning labels.................................. 10 Warning labels.................................. 13
Specifications and requirements... 17 Specifications ................................ 17 Installation requirements ............... 18
Boat horsepower rating .................... 18 Mounting the outboard motor ........... 19
Propeller selection ........................ 19 Start-in-gear protection (F4, F6) ... 20 Engine oil requirements ................ 20 Fuel requirements ......................... 20
Gasoline ........................................... 20 Gasoline Additives............................ 22
Muddy or acidic water ................... 22 Anti-fouling paint ........................... 22 Motor disposal requirements......... 23 Emergency equipment .................. 23 Emission control information......... 23
North American models .................... 23 Star labels ........................................ 24
Components .................................... 26 Components diagram.................... 26
Fuel tank (built-in fuel tank) (F2.5) ... 28 Fuel tank (built-in fuel tank)
(F4, F6) ......................................... 28 Fuel tank (portable fuel tank)
(F4, F6) ......................................... 29 Fuel cock .......................................... 30 Tiller handle...................................... 31 Gear shift lever ................................. 31 Throttle grip ...................................... 32 Throttle indicator............................... 32 Throttle friction adjuster .................... 33 Engine shut-off cord (lanyard) and
clip................................................. 33 Engine stop button ........................... 34 Choke knob for pull type................... 34 Manual starter handle....................... 35 Steering friction adjuster................... 35 Trim rod (tilt pin) ............................... 36 Tilt lock mechanism (F4, F6) ............ 36 Tilt support bar (F4, F6).................... 36 Tilt support lever (F2.5) .................... 37 Cowling lock lever ............................ 37 Carrying handle ................................ 37
Installation ....................................... 39 Installation..................................... 39
Mounting the outboard motor ........... 39 Clamping the outboard motor ........... 41
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Table of contents
Operation ......................................... 43 First-time operation ....................... 43
Fill engine oil .................................... 43 Breaking in engine............................ 43 Getting to know your boat ................ 43
Checks before starting engine ...... 43 Fuel level .......................................... 43 Remove the top cowling ................... 44 Fuel system...................................... 44 Controls ............................................ 44 Engine shut-off cord (lanyard) .......... 45 Engine oil.......................................... 45 Engine .............................................. 46 Installing top cowling ........................ 46
Filling fuel ...................................... 48 Operating engine........................... 51
Sending fuel ..................................... 51 Starting engine ................................. 54
Checks after starting engine ......... 57 Cooling water ................................... 57
Warming up engine ....................... 58 Warming up ...................................... 58
Checks after engine warm up ....... 58 Shifting ............................................. 58 Stop switches ................................... 58
Shifting .......................................... 58 Stopping boat (F2.5) ..................... 60 Stopping boat (F4, F6) .................. 60 Stopping engine ............................ 60
Procedure......................................... 60 Trimming outboard motor.............. 62
Adjusting trim angle for manual tilt models .......................................... 63
Adjusting boat trim............................ 64 Tilting up and down ....................... 65
Procedure for tilting up ..................... 65 Procedure for tilting down................. 67
Shallow water (F4, F6) .................. 68 Cruising in shallow water.................. 68
Cruising in other conditions........... 70 Maintenance .................................... 71
Transporting and storing outboard motor.......................................... 71 Transporting/Dismounting
the outboard motor........................ 71 Storing outboard motor..................... 74 Procedure......................................... 74 Lubrication........................................ 78 Cleaning and anticorrosion
measures ...................................... 78 Cleaning the outboard motor ............ 78 Checking painted surface of
outboard motor.............................. 79 Periodic maintenance ................... 79
Replacement parts ........................... 79 Maintenance interval guidelines ....... 79 Maintenance chart 1......................... 80 Maintenance chart 2......................... 82 Greasing........................................... 82 Cleaning and adjusting spark plug ... 84 Checking fuel filter (F2.5) ................. 85 Checking fuel filter (F4, F6) .............. 85 Inspecting idle speed........................ 85 Changing engine oil.......................... 85 Checking connector and lead........... 89 Checking propeller ........................... 89 Removing propeller .......................... 89 Installing propeller ............................ 90 Changing gear oil ............................. 90 Inspecting and replacing anode
(external) ....................................... 92 Trouble Recovery............................ 93
Troubleshooting ............................ 93 Temporary action in emergency ... 95
Impact damage................................. 95 Starter will not operate ..................... 95 Emergency engine starting............... 95
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Table of contents
Treatment of submerged motor... 100 Consumer information.................. 101
YAMAHA FOUR-STROKE OUTBOARD MOTOR THREE-YEAR LIMITED WARRANTY............................. 101
IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE THE U.S.A. OR CANADA ........ 103
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1
Safety information EMU33622
Outboard motor safety Observe these precautions at all times. EMU36501
Propeller People can be injured or killed if they come in contact with the propeller. The propeller can keep moving even when the motor is in neu- tral, and sharp edges of the propeller can cut even when stationary. Stop the engine when a person is in the wa-
ter near you. Keep people out of reach of the propeller,
even when the engine is off. EMU33630
Rotating parts Hands, feet, hair, jewelry, clothing, PFD straps, etc. can become entangled with inter- nal rotating parts of the engine, resulting in se- rious injury or death. Keep the top cowling in place whenever pos- sible. Do not remove or replace the cowling with the engine running. Only operate the engine with the cowling re- moved according to the specific instructions in the manual. Keep hands, feet, hair, jewelry, clothing, PFD straps, etc. away from any ex- posed moving parts. EMU33640
Hot parts During and after operation, engine parts are hot enough to cause burns. Avoid touching any parts under the top cowling until the en- gine has cooled. EMU33650
Electric shock Do not touch any electrical parts while starting or operating the engine. They can cause shock or electrocution. EMU33671
Engine shut-off cord (lanyard) Attach the engine shut-off cord so that the en- gine stops if the operator falls overboard or leaves the helm. This prevents the boat from
running away under power and leaving peo- ple stranded, or running over people or ob- jects. Always attach the engine shut-off cord to a secure place on your clothing or your arm or leg while operating. Do not remove it to leave the helm while the boat is moving. Do not at- tach the cord to clothing that could tear loose, or route the cord where it could become en- tangled, preventing it from functioning. Do not route the cord where it is likely to be accidentally pulled out. If the cord is pulled during operation, the engine will shut off and you will lose most steering control. The boat could slow rapidly, throwing people and ob- jects forward. EMU33810
Gasoline Gasoline and its vapors are highly flam- mable and explosive. Always, refuel accord- ing to the procedure on page 51 to reduce the risk of fire and explosion. EMU33820
Gasoline exposure and spills Take care not to spill gasoline. If gasoline spills, wipe it up immediately with dry rags. Dispose of rags properly. If any gasoline spills onto your skin, immedi- ately wash with soap and water. Change clothing if gasoline spills on it. If you swallow gasoline, inhale a lot of gaso- line vapor, or get gasoline in your eyes, get immediate medical attention. Never siphon fuel by mouth. EMU33900
Carbon monoxide This product emits exhaust gases which con- tain 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 ex- haust outlets.
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Safety information
2
EMU33780
Modifications Do not attempt to modify this outboard motor. Modifications to your outboard motor may re- duce safety and reliability, and render the out- board unsafe or illegal to use. EMU33740
Boating safety This section includes a few of the many im- portant safety precautions that you should fol- low when boating. EMU33710
Alcohol and drugs Never operate after drinking alcohol or taking drugs. Intoxication is one of the most common factors contributing to boating fatalities. EMU33720
Personal flotation devices Have an approved personal flotation device (PFD) on board for every occupant. Yamaha recommends that you must wear a PFD whenever boating. At a minimum, children and non-swimmers should always wear PFDs, and everyone should wear PFDs when there are potentially hazardous boating condi- tions. EMU33731
People in the water Always watch carefully for people in the wa- ter, such as swimmers, skiers, or divers, whenever the engine is running. When some- one is in the water near the boat, shift into neutral and stop the engine. Stay away from swimming areas. Swimmers can be hard to see. The propeller can keep moving even when the motor is in neutral. Stop the engine when a person is in the water near you. EMU33751
Passengers Consult your boat manufacturers instructions for details about appropriate passenger loca- tions in your boat and be sure all passengers are positioned properly before accelerating
and when operating above an idle speed. Standing or sitting in non-designated loca- tions may result in being thrown either over- board or within the boat due to waves, wakes, or sudden changes in speed or direction. Even when people are positioned properly, alert your passengers if you must make any unusual maneuver. Always avoid jumping waves or wakes. EMU33760
Overloading Do not overload the boat. Consult the boat ca- pacity plate or boat manufacturer for maxi- mum weight and number of passengers. Be sure that weight is properly distributed ac- cording to the boat manufacturers instruc- tions. Overloading or incorrect weight distribution can compromise the boats han- dling and lead to an accident, capsizing or swamping. EMU33772
Avoid collisions Scan constantly for people, objects, and other boats. Be alert for conditions that limit your visibility or block your vision of others.
Operate defensively at safe speeds and keep a safe distance away from people, objects, and other boats. Do not follow directly behind other boats or
waterskiers.
ZMU06025
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Safety information
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Avoid sharp turns or other maneuvers that make it hard for others to avoid you or un- derstand where you are going.
Avoid areas with submerged objects or shallow water.
Ride within your limits and avoid aggressive maneuvers to reduce the risk of loss of con- trol, ejection, and collision.
Take early action to avoid collisions. Re- member, boats do not have brakes, and stopping the engine or reducing throttle can reduce the ability to steer. If you are not sure that you can stop in time before hitting an obstacle, apply throttle and turn in anoth- er direction.
EMU33790
Weather Stay informed about the weather. Check weather forecasts before boating. Avoid boat- ing in hazardous weather. EMU44160
Accident reporting Boat operators are required by law to file a Boating Accident Report with their boating law enforcement agency if their boat is involved in any of the following accidents: 1. There is loss of life or probable loss of life. 2. There is personal injury that requires
medical attention beyond first aid. 3. There is property damage to boats or oth-
er property over a certain amount. 4. There is complete loss of a boat. Contact local law enforcement personnel if a report is necessary. EMU44170
Boat education and training For U.S.A. Operators should take a boating safety course. This may be required in your state. Many of the organizations listed in the next section can provide information about cours- es in your area.
You may also want to consider an Internet- based program for basic boater education. The Online Boating Safety Course provided by the BoatU.S. Foundation, is approved by the National Association of State Boating Law Administrators (NASBLA) and recognized by the United States Coast Guard. Most, but not all, states accept this course to meet their minimum requirements. While it cannot re- place an in-depth course such as one offered by the U.S. Coast Guard, U.S. Power Squad- ron, or other organization, this online course does provide a general overview of the basics in boating safety, requirements, navigation, and operation. Upon successful completion of the course, the user can download a certifi- cate of completion immediately or, for a small charge, request one by mail. To take this free course, go to boatus.org. For Canada All operators of pleasure craft must illustrate competency by means of a Pleasure Craft Operators Card with the exception of Person- al Water Craft used for rental purposes which require a rental checklist be completed. Plea- sure Craft Operators Cards can be obtained following the completion of a competency course, with an on-line option. Details can be found on Transport Canadas website. www.tc.gc.ca EMU33880
Passenger training Make sure at least one other passenger is trained to operate the boat in the event of an emergency. EMU33890
Boating safety publications Be informed about boating safety. Additional publications and information can be obtained from many boating organizations.
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EMU33590
Laws and regulations Know the marine laws and regulations where you will be boating- and obey them. Several sets of rules prevail according to geographic location, but all are basically the same as the International Rules of the Road. The rules presented in the following section are con- densed- and have been provided for your convenience only. Contact the U.S. Coast Guard, the National Association of State Boating Law Administra- tors, or your local Power Squadron for a com- plete set of rules governing the waters in which you will be using your boat. EMU44180
Boating organizations The following organizations provide boating safety training and information about boating safety and laws.
In the U.S.A. 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 http://www.uscgboating.org/
United States Power Squadrons 1-888-FOR-USPS (1-888-367-8777) http://www.usps.org/
Boat Owners Association of The United States 1-800-336-BOAT (1-800-336-2628) http://www.boatus.com/
National Association of State Boating Law Administrators (NASBLA) 1500 Leestown Road, Suite 330
Lexington, KY 40511 859-225-9497 http://www.nasbla.org/
National Marine Manufacturers Associa- tion (NMMA) 200 East Randolph Drive Suite 5100 Chicago, IL 60601 http://www.nmma.org/
Marine Retailers Association of America 155 N. Michigan Ave. Chicago, IL 60304 http://www.mraa.com/
In the Canada National Marine Manufacturers Associa- tion Canada 14 McEwan Drive Suite 8 Bolton, ON L7E 1H1 http://www.nmma.org/
EMU33691
Basic boating rules (Rules of the road)
Just as there are rules that apply when you are driving on streets and highways, there are waterway rules that apply when you are driv- ing your boat. These rules are used interna- tionally. (For U.S.A.: 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 encoun- ter another vessel on the water. EMU33700
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 that
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Safety information
5
does not have the right-of-way is called the give-way or burdenedvessel. 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 that 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. 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 naviga- tion and collision, and to any special circum- stances, which may render a departure from the above rules necessary in order to avoid immediate 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.
EMU25521
Rules when encountering vessels There are three main situations that you may encounter with other vessels which could lead to a collision unless the Steering Rules are fol- lowed: 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 acci- dent. 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.
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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.
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.
EMU25531
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 that 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 that can navigate only in such a channel.
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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 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.
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ZMU01708
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General information
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EMU25171
Identification numbers record EMU25184
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. F2.5
F4, F6
1. Outboard motor serial number location
1. Outboard motor serial number location
ZMU06705
1
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General information
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EMU33523
Read manuals and labels Before operating or working on this outboard motor: Read this manual. Read any manuals supplied with the boat. Read all labels on the outboard motor and the boat. If you need any additional information, contact your Yamaha dealer. EMU33832
Warning labels If these labels are damaged or missing, contact your Yamaha dealer for replacements. F2.5
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General information
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EMU44250
Contents of labels The above warning labels mean as follows. 1
WARNING EWM02730
Gasoline is highly flammable and explo- sive. Shut off engine before refueling. Tighten tank cap and air vent valve when not in use.
2
WARNING EWM01681
Keep hands, hair, and clothing away from rotating parts while the engine is running.
Do not touch or remove electrical parts when starting or during operation.
3
WARNING EWM01671
Read Owners Manuals and labels. Wear an approved personal flotation de-
vice (PFD). Attach engine shut-off cord (lanyard) to
your PFD, arm, or leg so the engine stops if you accidentally leave the helm, which could prevent a runaway boat.
ZMU05811
1 2
3
Gasoline is highly flammable and explosive. Shut off engine before refueling. Tighten tank cap and air vent valve when not in use.
YAMAHA 6S7-42698-60
WARNING
Lessence est extrmement inflammable et explosive. Areter le moteur avant de taire le plein de carburant. Fermer le capuchon du rservoir et la soupape de mise pression atmosphrique lorsquil nest pas utilis.
YAMAHA 6S7-42698-70
AVERTISSEMENT
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General information
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EMU35132
Symbols The following symbols mean as follows.
Notice/Warning
Read Owners Manual
Hazard caused by continuous rotation
Electrical hazard
ZMU05696
ZMU05664
ZMU05665
ZMU05666
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EMU42710
Warning labels If these labels are damaged or missing, contact your Yamaha dealer for replacements. F4, F6
4
3
1 2
ZMU06795
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General information
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ZMU06861
1 2
3 4
Gasoline is highly flammable and explosive. Shut off engine before refueling. Tighten tank cap and air vent valve when not in use.
YAMAHA 6S7-42698-60
WARNING
Lessence est extrmement inflammable et explosive. Areter le moteur avant de taire le plein de carburant. Fermer le capuchon du rservoir et la soupape de mise pression atmosphrique lorsquil nest pas utilis.
YAMAHA 6S7-42698-70
AVERTISSEMENT
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General information
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EMU44260
Contents of labels The above warning labels mean as follows. 1
WARNING EWM01691
Emergency starting does not have start- in-gear protection. Ensure shift control is in neutral before starting engine.
2
WARNING EWM01681
Keep hands, hair, and clothing away from rotating parts while the engine is running.
Do not touch or remove electrical parts when starting or during operation.
3
WARNING EWM01671
Read Owners Manuals and labels. Wear an approved personal flotation de-
vice (PFD). Attach engine shut-off cord (lanyard) to
your PFD, arm, or leg so the engine stops if you accidentally leave the helm, which could prevent a runaway boat.
4
WARNING EWM02730
Gasoline is highly flammable and explo- sive. Shut off engine before refueling. Tighten tank cap and air vent valve when not in use.
EMU42750
Symbols The following symbols mean as follows.
Notice/Warning
Read Owners Manual
Hazard caused by continuous rotation
ZMU05696
ZMU05664
ZMU05665
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General information
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Electrical hazard
ZMU05666
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Specifications and requirements
17
EMU38091
Specifications TIP: (AL) stated in the specification data below represents the numerical value for the alumi- num propeller installed. EMU2821P
Dimension: Overall length:
F2.5MHA 623 mm (24.5 in) F4MHA 750 mm (29.5 in) F6MHA 750 mm (29.5 in)
Overall width: F2.5MHA 345 mm (13.6 in) F4MHA 403 mm (15.9 in) F6MHA 403 mm (15.9 in)
Overall height S: F2.5MHA 1021 mm (40.2 in) F4MHA 1040 mm (40.9 in) F6MHA 1040 mm (40.9 in)
Overall height L: F2.5MHA 1148 mm (45.2 in) F4MHA 1168 mm (46.0 in) F6MHA 1168 mm (46.0 in)
Motor transom height S: F2.5MHA 432 mm (17.0 in) F4MHA 440 mm (17.3 in) F6MHA 440 mm (17.3 in)
Motor transom height L: F2.5MHA 559 mm (22.0 in) F4MHA 568 mm (22.4 in) F6MHA 568 mm (22.4 in)
Dry weight (AL) S: F2.5MHA 17 kg (37 lb) F4MHA 27 kg (60 lb) F6MHA 27 kg (60 lb)
Dry weight (AL) L: F2.5MHA 18 kg (40 lb) F4MHA 28 kg (62 lb) F6MHA 28 kg (62 lb)
Performance: Full throttle operating range:
F2.5MHA 52505750 r/min F4MHA 40005000 r/min F6MHA 45005500 r/min
Rated power: F2.5MHA 1.8 kW (2.5 HP)
Rated power: F4MHA 2.9 kW (4 HP) F6MHA 4.4 kW (6 HP)
Idle speed (in neutral): F2.5MHA 1800-2000 r/min F4MHA 1450-1550 r/min F6MHA 1450-1550 r/min
Engine: Type:
4-stroke OHV S1 2valves Displacement:
F2.5MHA 72 cm (2.4 US oz, 2.5 Imp.oz) F4MHA 139 cm (4.7 US oz, 4.9 Imp.oz) F6MHA 139 cm (4.7 US oz, 4.9 Imp.oz)
Bore stroke: F2.5MHA 54.0 31.5 mm (2.13 1.24 in) F4MHA 62.0 46.0 mm (2.44 1.81 in) F6MHA 62.0 46.0 mm (2.44 1.81 in)
Ignition system: F2.5MHA TCI F4MHA CDI F6MHA CDI
Spark plug (NGK): F2.5MHA BR6HS F4MHA CR6HSB F6MHA CR6HSB
Spark plug gap: 0.60.7 mm (0.0240.028 in)
Control system: Tiller handle
Starting system: Manual starter
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Specifications and requirements
18
Starting carburetion system: Choke valve
Valve clearance IN (cold engine): 0.080.12 mm (0.00320.0047 in)
Valve clearance EX (cold engine): 0.080.12 mm (0.00320.0047 in)
Drive unit: Gear shift positions:
F2.5MHA Forward-neutral F4MHA Forward-neutral-reverse F6MHA Forward-neutral-reverse
Gear ratio: 2.08(27/13)
Trim and tilt system: Manual tilt
Propeller mark: F2.5MHA BS F4MHA BA F6MHA BA
Fuel and oil: Recommended fuel:
Regular unleaded gasoline Min. pump octane number:
86 Fuel tank capacity:
F4MHA 12 L (3.17 US gal, 2.64 Imp.gal) F6MHA 12 L (3.17 US gal, 2.64 Imp.gal)
Fuel tank capacity (built in type): F2.5MHA 0.9 L (0.24 US gal, 0.20 Imp.gal) F4MHA 1.1 L (0.29 US gal, 0.24 Imp.gal) F6MHA 1.1 L (0.29 US gal, 0.24 Imp.gal)
Recommended engine oil: YAMALUBE 4-M FC-W or 4-stroke outboard motor oil
Recommended engine oil grade 1: SAE 10W-30/10W-40/5W-30 API SE/SF/SG/SH/SJ/SL
Engine oil quantity: F2.5MHA 0.4 L (0.42 US qt, 0.35 Imp.qt) F4MHA 0.6 L (0.63 US qt, 0.53 Imp.qt) F6MHA 0.6 L (0.63 US qt, 0.53 Imp.qt)
Lubrication system: F2.5MHA Splash F4MHA Wet sump F6MHA Wet sump
Recommended gear oil: Hypoid gear oil
Recommended gear oil grade: SAE 90 API GL-4
Gear oil quantity: F2.5MHA 0.075 L (0.079 US qt, 0.066 Imp.qt) F4MHA 0.100 L (0.106 US qt, 0.088 Imp.qt) F6MHA 0.100 L (0.106 US qt, 0.088 Imp.qt)
Tightening torque for engine: Spark plug:
F2.5MHA 25 Nm (2.55 kgf-m, 18.4 ft-lb) F4MHA 13 Nm (1.33 kgf-m, 9.6 ft-lb) F6MHA 13 Nm (1.33 kgf-m, 9.6 ft-lb)
Engine oil drain bolt: 18 Nm (1.84 kgf-m, 13.3 ft-lb)
EMU33554
Installation requirements EMU33564
Boat horsepower rating
WARNING EWM01560
Overpowering a boat can cause severe in- stability.
Before installing the outboard motor(s), con- firm that the total horsepower of your out- board motor(s) does not exceed the boats maximum horsepower rating. See the boats capacity plate or contact the manufacturer.
U6BV36E0.book Page 18 Monday, April 9, 2012 3:20 PM
Specifications and requirements
19
EMU43000
Mounting the outboard motor F2.5
WARNING EWM01570
Improper mounting of the outboard mo- tor could result in hazardous conditions such as poor handling, loss of control, or fire hazards.
Because the motor is very heavy, spe- cial equipment and training is required to mount it safely.
Your dealer or other person experienced in proper rigging should mount the motor using correct equipment and complete rigging in- structions. For further information, see page 39. F4, F6
WARNING EWM02430
Improper mounting of the outboard motor could result in hazardous conditions, such as poor handling, loss of control, or fire hazards. If you are not able to mount the outboard motor properly, consult a Yamaha dealer.
To lift and mount the outboard motor, two people are necessary. For further information, see page 39. EMU34195
Propeller selection Next to selecting an outboard motor, selecting the right propeller is one of the most important purchasing decisions a boater can make. The type, size, and design of your propeller have a direct impact on acceleration, top speed, fuel economy, and even engine life. Yamaha designs and manufactures propellers for ev- ery Yamaha outboard motor and every appli- cation.
Your outboard motor came with a Yamaha propeller selected to perform well over a range of applications, but there may be uses where a different propeller would be more ap- propriate. Your Yamaha dealer can help you select the right propeller for your boating needs. Select a propeller that will allow the engine to reach the middle or upper half of the operating range at full throttle with the maximum boat- load. Generally, select a larger pitch propeller for a smaller operating load and a smaller pitch propeller for a heavier load. If you carry loads that vary widely, select the propeller that lets the engine run in the proper range for your maximum load but remember that you may need to reduce your throttle setting to stay within the recommended engine speed range when carrying lighter loads. To check the propeller, see page 89. F2.5
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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Specifications and requirements
20
F4, F6
EMU39191
Start-in-gear protection (F4, F6) Yamaha outboard motors are equipped with start-in-gear protection device. This feature permits the engine to be started only when it is in neutral. Always select neutral before starting the engine. EMU39692
Engine oil requirements Select an oil grade according to the average temperatures in the area where the outboard motor will be used.
If oil grades listed under Recommended en- gine oil grade 1 are not available, select an al- ternative oil grade listed under Recommended engine oil grade 2. Recommended engine oil grade 1
Recommended engine oil grade 2
EMU36360
Fuel requirements EMU41331
Gasoline Use a good quality gasoline that meets the minimum octane requirement. If knocking or pinging occurs, use a different brand of gaso- line or premium unleaded fuel. Yamaha rec- ommends that you use alcohol-free gasoline (see Gasoline with Ethanol) whenever possi- ble. The use of a poor quality gasoline may result in starting and running problems. If you en- counter drivability problems, which you sus- pect could be related to the fuel you are using, we recommend that you switch to a recog- nized high quality brand of gasoline, such as
1. Propeller diameter in inches 2. Propeller pitch in inches 3. Type of propeller (propeller mark)
Recommended engine oil: YAMALUBE 4-M FC-W or 4-stroke outboard motor oil
Recommended engine oil grade 1: SAE 10W-30/10W-40/5W-30 API SE/SF/SG/SH/SJ/SL
Recommended engine oil grade 2: SAE 15W-40/20W-40/20W-50 API SH/SJ/SL
Engine oil quantity: F2.5MHA 0.4 L (0.42 US qt, 0.35 Imp.qt) F4MHA 0.6 L (0.63 US qt, 0.53 Imp.qt) F6MHA 0.6 L (0.63 US qt, 0.53 Imp.qt)
ZMU06853
-x 1 2 3
ZMU06854
122F
50C
104
40
86
30
68
SAE API
SE SF SG SH SJ SL
20
50
10
32
0
14
-10
-4
-20
10W30
10W40
5W30
ZMU06855
122F
50C
104
40
86
30
68
SAE API
SH SJ SL
20
50
10
32
0
14
-10
-4
-20
15W40
20W40
20W50
U6BV36E0.book Page 20 Monday, April 9, 2012 3:20 PM