EMU31280 your machine and this manual. If there is any To the owner question concerning this manual, please con- Thank you for choosing a Yamaha outboard sult your Yamaha dealer. motor. This Owner’s Manual contains infor- NOTE: mation needed for proper operation, mainte- The F6MH, F8MH, T8EH, T8PH, T8PR and nance and care.
Table of contents Throttle friction adjuster ....17 General information ......1 Engine stop lanyard switch....18 Identification numbers record ..1 Engine stop button ......18 Outboard motor serial number ... 1 Choke knob for pull type....19 Key number ........1 Manual starter handle.......
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Table of contents Consumer information....76 Important warranty information for U.S.A. and Canada ....76 YAMAHA MOTOR CORPORATION, U.S.A. FOUR-STROKE OUTBOARD MOTOR THREE-YEAR LIMITED WARRANTY ....78 IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE THE USA OR CANADA ..... 80...
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. EMU25190...
General information New Technology; (4-stroke/HPDI) EM Manufactured: ZMU04346 EMU25272 Star labels 1. Approval label location Your outboard motor is labeled with a Califor- nia Air Resources Board (CARB) star label. See below for a description of your particular label. ZMU05159 EMU25262 Manufactured date label This label is attached to the clamp bracket or...
General information ZMU01702 ZMU01704 EMU25290 EMU25362 Two Stars—Very Low Emission The two-star label identifies engines that meet Safety information the Air Resources Board’s 2004 exhaust Before mounting or operating the outboard emission standards. Engines meeting these motor, read this entire manual. Reading it standards have 20% lower emissions than should give you an understanding of the One Star-Low-Emission engines.
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Never illegally discard (dump) the product. Attach the engine stop switch lanyard cord Yamaha recommends consulting the deal- to a secure place on your clothing, or your er on discarding the product. arm or leg while operating. If you acciden- Be informed about boating safety.
General information EMU25382 EMU25465 Important labels Caution labels EMU25395 Warning labels EMU25473 Label ECM01191 EMU25401 Label CAUTION: EWM01260 Transport and store the engine only as WARNING shown. Otherwise, engine damage could Be sure shift control is in neutral before result from leaking oil. starting engine.
General information Several sets of rules prevail according to geo- “In obeying and construing these rules due re- graphic location, but are all basically the same gard shall be had to all dangers of navigation as the International Rules of the Road. The and collision, and to any special circumstanc- rules presented here in your Owner’s Manual es, which may render a departure from the...
General information Meeting Overtaking If you are meeting another power vessel head If you are passing another vessel, you are the on, and are close enough to run the risk of col- “Give-Way” vessel. This means that the other lision, neither of you has the right-of-way! vessel is expected to maintain its course and Both of you should alter course to avoid an ac- speed.
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General information When the sailing vessel is overtaking the power-driven vessel, the power-driven vessel has the right-of-way. Sailing vessels should keep clear of any fishing vessel. 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.
General information ZMU01708 EMU25540 Do not smoke when refueling, and keep Fueling instructions away from sparks, flames, or other EWM00010 sources of ignition. WARNING Stop engine before refueling. GASOLINE AND ITS VAPORS ARE HIGH- Refuel in a well-ventilated area. Refuel LY FLAMMABLE AND EXPLOSIVE! portable fuel tanks off the boat.
All 4-stroke engines are shipped from the ethanol content does not exceed 10% and the factory without engine oil. fuel meets minimum octane ratings. Yamaha does not recommended gasohol containing methanol because it can cause fuel system damage or engine performance problems.
18 volts or not meet specifications is used, the elec- higher with the above models. Consult your tric system could perform poorly or be Yamaha dealer for details on installing an op- overloaded, causing electric system dam- tional Rectifier Regulator. age.
General information Yamaha dealers stock a range of propellers, For instructions on propeller removal and in- and can advise you and install a propeller on stallation, see page 61. your outboard that is best suited to your appli- EMU25770 Start-in-gear protection cation.
Basic components EMU25797 Main components NOTE: * May not be exactly as shown; also may not be included as standard equipment on all models. F6, F8 1. Top cowling 16.Clamp screw 2. Top cowling lock lever 17.Rope attachment 3. Anti-cavitation plate 18.Flushing device...
Basic components 1. Top cowling 21.Choke knob 2. Top cowling lock lever 22.Remote control box (side mount type)* 3. Anti-cavitation plate EMU25802 Fuel tank 4. Propeller If your model was equipped with a portable 5. Cooling water inlet 6. Drain screw fuel tank, its function is as follows.
Basic components EMU26201 EMU26221 Neutral interlock trigger Choke switch To shift out of neutral, first pull the neutral in- To activate the choke system, press in the terlock trigger up. main switch while the key is turned to the “ ”...
Basic components 1. Forward “ ” 1. Throttle indicator 2. Neutral “ ” EMU25971 Throttle friction adjuster 3. Reverse “ ” A friction device provides adjustable resis- EMU25941 Throttle grip tance to movement of the throttle grip or the The throttle grip is on the tiller handle. Turn remote control lever, and can be set accord- the grip counterclockwise to increase speed ing to operator preference.
Basic components NOTE: The engine cannot be started with the lock plate removed. When constant speed is desired, tighten the adjuster to maintain the desired throttle set- ting. EMU25990 Engine stop lanyard switch 1. Lanyard The lock plate must be attached to the engine 2.
Basic components EMU26011 Choke knob for pull type To supply the engine with the rich fuel mixture required to start, pull out this knob. EMU26090 Main switch The main switch controls the ignition system; its operation is described below. “ ”...
Basic components tor up. Pressing the switch “ ” (down) tilts EMU31430 Steering friction adjuster the outboard motor down. When the switch is A friction device provides adjustable resis- released, the outboard motor will stop in its tance to the steering mechanism, and can be current position.
Basic components 1. Nut 1. Tilt lock lever To lock it, set the tilt lock lever in the lock po- Nut tightening torque: sition. To release, push the tilt lock lever in the 6.0 Nm (4.4 ft-lb) (0.61 kgf-m) release position. EMU26320 NOTE: Tilt support knob...
Basic components EMU26360 EMU26460 Power tilt unit Flushing device This unit tilts the outboard motor up and down This device is used to clean the cooling water and is controlled with the power tilt switch. passages of the motor using a garden hose and tap water.
ECM00090 CAUTION: Do not continue to operate the engine if a warning device has activated. Consult your Yamaha dealer if the problem cannot be located and corrected. EMU30167 Low oil pressure warning If the oil pressure drops too low, the warning 1.
Operation EMU26901 EWM00830 Installation WARNING ECM00110 Improper mounting of the outboard motor CAUTION: could result in hazardous conditions such Incorrect engine height or obstructions to as poor handling, loss of control, or fire smooth water flow (such as the design or hazards.
Consult your mounting point on the boat. Otherwise Yamaha dealer or boat manufacturer for the engine could be completely lost if it further information on determining the prop- accidentally falls off the transom.
Check fuel line connections to be sure they ECM00800 CAUTION: are tight (if equipped Yamaha fuel tank or Failure to follow the break-in procedure boat tank). could result in reduced engine life or even Be sure the fuel tank is positioned on a se- severe engine damage.
Operation 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.
Performance drops and engine wear increases dramatical- 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-...
Operation ZMU02024 If a steering friction adjuster is provided NOTE: on your outboard motor, securely attach The start-in-gear protection device prevents the fuel line to the fuel line clamp. the engine from starting except when in neu- tral. NOTE: During engine operation place the tank hori- Attach the engine stop switch lanyard to zontally, otherwise fuel cannot be drawn from a secure place on your clothing, or your...
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Operation If the choke knob is left in the “ ” (start) position while the engine is running, the en- gine will run poorly or stall. Pull the manual starter handle slowly until you feel resistance. Then give a strong pull straight out to crank and start the en- gine.
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Operation again. Also if the engine is warm and fails to boat could slow rapidly. This could start, open the throttle a same amount and cause people and objects in the boat to try to start the engine again. If the engine be thrown forward.
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Operation NOTE: It is not necessary to use the choke when starting a warm engine. If the choke knob is left in the “ ” (start) position while the engine is running, the en- gine will run poorly or stall. Push the starter button to start the motor.
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Operation Attach the engine stop switch lanyard to a secure place on your clothing, or your arm or leg. Then install the lock plate on the other end of the lanyard into the en- gine stop switch. EWM00120 WARNING Attach the engine stop switch lanyard to a secure place on your clothing, or your arm or leg while operating.
” er case or the cooling water pilot hole is (start) while the engine is running. blocked. Consult your Yamaha dealer if Do not keep the starter motor turning for the problem cannot be located and cor- more than 5 seconds. If the starter motor rected.
Operation EMU27740 Remote control models Shifting Pull up the neutral interlock trigger (if EWM00180 equipped) and move the remote control lever WARNING quickly and firmly from neutral to forward. Before shifting, make sure there are no swimmers or obstacles in the water near you.
Operation ZMU02030 Pull up the neutral interlock trigger (if On models equipped with a tilt lock lever, equipped) and move the remote control check that it is in the lock/down position. lever quickly and firmly from neutral to re- verse. Move the gear shift lever quickly and firm- ly from neutral to reverse.
Operation NOTE: If the outboard motor is equipped with an en- gine stop switch lanyard, the engine can also be stopped by pulling the lanyard and remov- ing the lock plate from the engine stop switch. EMU27852 Procedure Turn the main switch to “ ”...
Operation engine, and propeller. Correct trim is also af- fected by variables such as the load in the boat, sea conditions, and running speed. EWM00740 WARNING Excessive trim for the operating condi- tions (either trim up or trim down) can cause boat instability and can make steer- ing the boat more difficult.
Operation EMU27902 Adjusting trim angle (power tilt mod- els) EWM00751 WARNING Be sure all people are clear of the out- board motor when adjusting the tilt an- gle, also be careful not to pinch any body parts between the drive unit and clamp bracket.
Operation also be adjusted to help offset this effect. the bow is greatly increased, heightening the When the bow of the boat is down, it is easier danger of “bow steering” and making opera- to accelerate from a standing start onto plane. tion difficult and dangerous.
Operation ECM00241 CAUTION: Before tilting the outboard motor, stop the engine by following the procedure on page 36. Never tilt the outboard mo- tor while the engine is running. Severe damage from overheating can result. Do not tilt up the engine by pushing the tiller handle (if equipped) because this could break the handle.
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Operation Disconnect the fuel line from the out- board motor or close the fuel cock. Push the tilt support knob into the clamp bracket or pull the tilt support lever toward Press the power trim and tilt switch / pow- you to support the engine.
Operation Models equipped with trim rods: Once the outboard motor is supported with the tilt support lever, press the power trim and tilt switch / power tilt switch “ ” (down) to retract the trim rods. ECM00250 CAUTION: Be sure to retract the trim rods completely during mooring.
Operation ECM00260 CAUTION: Do not tilt the outboard motor up so that the cooling water inlet on the lower unit is above the surface of the water when set- ting up for and cruising in shallow water. Otherwise severe damage from overheat- ing can result.
Operation Slightly tilt the outboard motor up. The tilt Slightly tilt the outboard motor up until the support bar will lock automatically, sup- tilt support bar automatically returns to porting the outboard motor in a partially the free position. raised position. Slowly lower the outboard motor to the normal position.
For cooling system flushing instructions, see page 49. Cruising in turbid water Yamaha strongly recommends that you use the optional chromium-plated water pump kit (not available for some models) if you use the outboard motor in turbid or muddy water con-...
Maintenance EMU31480 Transom height X: Specifications T8EH 625 mm (24.6 in) T8PH 625 mm (24.6 in) NOTE: T8PR 625 mm (24.6 in) “(AL)” stated in the specification data below Weight (AL) S: represents the numerical value for the alumi- F6MH 38.0 kg (84 lb) F8MH 38.0 kg (84 lb) num propeller installed.
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Maintenance Spark plug gap: Trim and tilt system: 0.9–1.0 mm (0.035–0.039 in) F6MH Manual tilt Control system: F8MH Manual tilt F6MH Tiller T8EH Manual tilt F8MH Tiller T8PH Power tilt T8EH Tiller T8PR Power tilt T8PH Tiller Propeller mark: T8PR Remote control F6MH N Starting system: F8MH N...
Maintenance Engine oil drain bolt: tion using a motor support device such as a 24.0 Nm (17.7 ft-lb) (2.45 kgf-m) transom saver bar. Consult your Yamaha EMU28222 dealer for further details. Transporting and storing out- EMU28235 board motor Clamp screw mounting models...
Maintenance It is advisable to have your outboard motor Install the outboard motor on the test serviced by an authorized Yamaha dealer pri- tank. or to storage. However, you, the owner, with a minimum of tools, can perform the following procedures.
LUB-SILCNE-13-00). when starting or during operation. Wax the cowling with a non-abrasive wax Keep hands, hair, and clothes away from such as “Yamaha Silicone Wax” (Part No. the flywheel and other rotating parts ACC-11000-15-02). while the engine is running. EMU28430 Battery care Run the engine at a fast idle for 10–15...
Maintenance Batteries vary among manufacturers. There- fore the following procedures may not always apply. Consult your battery manufacturer’s in- structions. Procedure Disconnect and remove the battery from the boat. Always disconnect the black negative cable first to prevent the risk of shorting.
When flushing the engine with the boat in iar with machine servicing, this work the water, tilting up the outboard motor until should be done by your Yamaha dealer or it is completely out of the water will achieve other qualified mechanic.
When operating in salt water, turbid or muddy water, the engine should be flushed with clean water after each use. The “ ” symbol indicates the check-ups which you may carry out yourself. The “ ” symbol indicates work to be carried out by your Yamaha dealer. Initial Every Item Actions...
Maintenance EMU28931 Greasing Yamaha marine grease (Water resistant grease) be careful not to damage the insulator. A EMU28952 Cleaning and adjusting spark plug damaged insulator could allow external EWM00560 sparks, which could lead to explosion or WARNING fire. When removing or installing a spark plug,...
1/4 to 1/2 a turn past finger- agnose any problems yourself. Instead, take tight. Have the spark plug adjusted to the cor- the outboard motor to a Yamaha dealer. You rect torque as soon as possible with a torque- should periodically remove and inspect the wrench.
Yamaha dealer or other ter is found in the filter, replace it. For replace- qualified mechanic. ment of the fuel filter, consult your Yamaha dealer. Verify whether the idle speed is set to specification. For idle speed specifica- tions, see page 47.
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Maintenance Be sure the outboard motor is securely drain hole. Then remove the oil filler cap. fastened to the transom or a stable Let the oil drain completely. Wipe up any stand. spilled oil immediately. ECM00970 CAUTION: Do not overfill the oil, and be sure the outboard motor is upright (not tilted) when checking and changing the engine oil.
Start the engine and check that no water leaks from the joints between the exhaust cover, cylinder head, and body cylinder. EMU29140 Engine oil leakage Check for oil leaks on the around the engine. NOTE: If any leaks are found, consult your Yamaha dealer. ZMU02058...
Check that the trim and tilt rod / the tilt rod is free of corrosion or other flaws. Tilt the outboard motor down. Check that the trim and tilt rod / the tilt rod operates smoothly. NOTE: Consult your Yamaha dealer if any operation is abnormal. ZMU01897 Checkpoints...
Maintenance Check each of the propeller blades for wear, erosion from cavitation or ventilation, or other damage. Check the propeller shaft for damage. Check the splines / shear pin for wear or damage. Check for fish line tangled around the pro- peller shaft.
Severe injury could oc- tion and be lost. cur if the outboard motor accidentally falls. Apply Yamaha marine grease or a corro- sion resistant grease to the propeller Tilt the outboard motor so that the gear oil shaft.
Maintenance EMU29302 NOTE: Cleaning fuel tank For disposal of used oil, consult your Yamaha EWM00920 WARNING dealer. Gasoline is highly flammable, and its va- With the outboard motor in a vertical po- pors are flammable and explosive. sition, and using a flexible or pressurized...
Do not paint anodes, as this would render them ineffective. NOTE: Inspect ground leads attached to external an- EMU29320 odes on equipped models. Consult a Yamaha Checking battery (for electric start dealer for inspection and replacement of inter- models) nal anodes attached to the power unit.
(for example: welding the battery when it is low. equipment, lighted cigarettes, and so NOTE: on.) Consult a Yamaha dealer when charging or DO NOT SMOKE when charging or han- re-charging batteries. dling batteries. KEEP BATTERIES AND ELECTROLYTIC...
EMU29390 Checking top cowling Check the fitting of the top cowling by pushing it with both hands. If it is loose have it repaired by your Yamaha dealer. EMU29400 Coating the boat bottom A clean hull improves boat performance. The boat bottom should be kept as clean of marine growth as possible.
Yamaha outboard motors. Therefore Q. Has fuel pump malfunctioned? some items may not apply to your model. A. Have serviced by a Yamaha dealer. If your outboard motor requires repair, bring it to your Yamaha dealer. Q. Are spark plug(s) fouled or of incorrect...
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A. Return to normal operating position. A. Fill tank with clean, fresh fuel. Q. Is carburetor clogged? Q. Is fuel filter clogged? A. Have serviced by a Yamaha dealer. A. Clean or replace filter. Q. Is fuel joint connection incorrect? Q. Have ignition parts failed? A.
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Q. Is fuel system obstructed? Q. Is water pump or thermostat faulty? A. Check for pinched or kinked fuel line or oth- A. Have serviced by a Yamaha dealer. er obstructions in fuel system. Q. Is there excess water in fuel filter cup? Q.
Be sure to use the specified fuse. An in- Q. Is steering pivot loose or damaged? correct fuse or a piece of wire could allow A. Tighten or have serviced by a Yamaha excessive current flow. This could cause dealer.
Trouble Recovery EMU29532 Starter will not operate If the starter mechanism does not operate (the engine cannot be cranked with the start- er), the engine can be started with an emer- gency starter rope. EWM01021 WARNING Use this procedure only in an emergen- cy to return to the nearest port for re- pairs.
Trouble Recovery engine is running. Do not install the tached to the engine stop switch. The starter mechanism or top cowling after main switch must be “ ” (on), if the engine is running. equipped. Do not touch the ignition coil, spark plug wire, spark plug cap, or other electrical components when starting or operating the motor.
Ignition system malfunction If the outboard motor is submerged, immedi- If the battery voltage is low or in the unlikely ately take it to a Yamaha dealer. Otherwise event of an ignition system malfunction, the some corrosion may begin almost immediate- engine speed may become erratic or the en- gine may stop.
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Trouble Recovery ECM00400 CAUTION: Do not attempt to run the outboard motor until it has been completely inspected.