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ZMU01690 Read this owner’s manual carefully before operating or working on your 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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EMU31281 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 F6AMH, F8CMH, T8DEH, T8DPH, nance and care.
Table of contents Basic requirements......15 General information ......1 Fueling instructions ....... 15 Identification numbers record ..1 Gasoline ........... 15 Outboard motor serial number ... 1 Engine oil.......... 15 Key number ........1 Installation requirements....16 Emission control information ... 1 Boat horsepower rating ....
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Table of contents Top cowling lock lever Procedure for tilting down (pull up type) ......... 28 (manual tilt models)....... 50 Flushing device ........ 29 Procedure for tilting down Warning indicator ......29 (power tilt models)......50 Low oil pressure-warning indicator... 29 Cruising in shallow water ....
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Procedure......... 84 Consumer information....85 Important warranty information for U.S.A. and Canada ....85 YAMAHA MOTOR CORPORATION, U.S.A. FOUR-STROKE OUTBOARD MOTOR THREE-YEAR LIMITED WARRANTY ....87 IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE THE USA OR CANADA ..... 89...
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- EMU25190 len.
General information New Technology; (4-stroke/HPDI) EM Manufactured: ZMU04346 EMU25273 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...
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General information ZMU01702 ZMU01704 EMU25290 EMU33861 Two Stars—Very Low Emission Four Stars—Super Ultra Low Emission The two-star label identifies engines that meet The four-star label identifies engines that the Air Resources Board’s 2004 exhaust meet the Air Resources Board’s Sterndrive emission standards.
Read all labels on the outboard motor and the boat. If you need any additional information, contact your Yamaha dealer. EMU33831 Warning labels If these labels are damaged or missing, contact your Yamaha dealer for replacements. F6AMH, F8CMH, T8DPH, T8DEH...
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General information EMU33841 Electrical hazard Symbols The following symbols mean as follows. Caution/Warning ZMU05666 Remote control lever/gear shift lever operat- ing direction, dual direction ZMU05696 Read Operator’s Manual ZMU05667 Engine start/ Engine cranking ZMU05664 Hazard caused by continuous rotation ZMU05668 ZMU05665...
Safety information EMU33621 EMU33670 Safety information Engine shut-off cord Attach the engine shut-off cord so that the en- Observe these precautions at all times. gine stops if the operator falls overboard or EMU33630 Rotating parts leaves the helm. This prevents the boat from Hands, feet, hair, jewelry, clothing, PFD running away under power and leaving peo- straps, etc.
Have an approved personal flotation device distribution can compromise the boats han- (PFD) on board for every occupant. Yamaha dling and lead to an accident, capsizing or recommends that you must wear a PFD swamping. whenever boating. At a minimum, children...
Safety information Avoid areas with submerged objects or Administrators (NASBLA) and recognized by shallow water. the United States Coast Guard. Most, but not Ride within your limits and avoid aggressive all, states accept this course to meet their maneuvers to reduce the risk of loss of con- minimum requirements.
Safety information EMU33680 www.mraa.com Boating organizations The following organizations provide boating EMU33690 Basic boating rules (Rules of safety training and information about boating safety and laws. the road) Just as there are rules that apply when you United States Coast Guard are driving on streets and highways, there are Consumer Affairs Staff (G-BC) waterway rules that apply when you are driv-...
Safety information 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, “...
Safety information 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.
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Safety information Many bodies of water used by boaters are en- white with black letters and orange boarders. tirely within the boundaries of a particular They signify speed zones, restricted areas, state. The Uniform State Waterway Marking danger areas, and general information. System has been devised for these waters.
GASOLINE AND ITS VAPORS ARE HIGH- ethanol content does not exceed 10% and the LY FLAMMABLE AND EXPLOSIVE! fuel meets minimum octane ratings. Yamaha Do not smoke when refueling, and keep does not recommended gasohol containing away from sparks, flames, or other methanol because it can cause fuel system sources of ignition.
Before installing the outboard motor(s), con- continue using the outboard. Contact firm that the total horsepower of your motor(s) your Yamaha dealer. does not exceed the boats maximum horse- EMU25693 power rating. See the boats capacity plate or Battery requirement contact the manufacturer.
T8DEH 323.0 A a different propeller would be more appropri- T8DPH 323.0 A ate. T8DPR 323.0 A Your Yamaha dealer can help you select the Minimum reserve capacity (RC/SAE): right propeller for your boating needs. Select T8DEH 52 minutes T8DPH 52 minutes...
2. Propeller pitch in inches 3. Type of propeller (propeller mark) EMU25770 Start-in-gear protection Yamaha outboard motors or Yamaha-ap- proved remote control units are equipped with start-in-gear protection device(s). This feature permits the engine to be started only when it is in neutral.
Basic components EMU2579D Main components NOTE: * May not be exactly as shown; also may not be included as standard equipment on all models. F6A, F8C 1. Top cowling 17.Throttle grip 2. Top cowling lock lever 18.Throttle friction adjuster 3. Anti-cavitation plate 19.Tilt lock lever...
Basic components 1. Top cowling 22.Clamp screw 2. Top cowling lock lever 23.Rope attachment 3. Anti-cavitation plate 24.Tilt support knob* 4. Propeller 25.Remote control box (side mount type)* 5. Cooling water inlet EMU25802 Fuel tank 6. Drain screw 7. Clamp bracket If your model was equipped with a portable 8.
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 clip re- moved. When constant speed is desired, tighten the adjuster to maintain the desired throttle set- ting. EMU25991 Engine shut-off switch 1. Cord The clip must be attached to the engine shut- 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 EMU31432 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 EMU30530 Tilt lock mechanism The tilt lock mechanism is used to prevent the outboard motor from lifting out of the water when in reverse gear. 1. Nut Nut tightening torque: 6.0 Nm (4.4 ft-lb) (0.61 kgf-m) 1. Tilt lock lever NOTE: Steering movement is blocked when the To lock it, set the tilt lock lever in the lock po-...
Basic components the normal running position, use an addi- tional support device to secure it in the tilt position. EMU26332 Tilt support bar The tilt support bar keeps the outboard motor in the tilted up position. 1. Power tilt unit 2.
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. EMU30168 Low oil pressure warning If the oil pressure drops too low, the warning device will activate.
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Check the oil level and add oil as needed. If the oil level is correct and the warning device does not switch off, consult your Yamaha dealer. ECM00101 CAUTION: Do not continue to run the engine if the low oil pressure-warning indicator is on.
Operation EMU26902 Installation The information presented in this section is in- tended as reference only. It is not possible to provide complete instructions for every possi- ble boat and motor combination. Proper mounting depends in part on experience and the specific boat and motor combination. EWM01590 WARNING ZMU01760...
Otherwise the optimum mounting height. Consult your the engine could be completely lost if it Yamaha dealer or boat manufacturer for accidentally falls off the transom. further information on determining the prop- er mounting height.
Your new engine requires a period of ten- board (if packed). For details, consult hours break-in to allow mating surfaces of your Yamaha dealer. moving parts to wear in evenly. Correct break- EWM00650 in will help ensure proper performance and WARNING longer engine life.
Check fuel line connections to be sure they are tight (if equipped Yamaha fuel tank or boat tank). Be sure the fuel tank is positioned on a se- cure, flat surface, and that the fuel line is not...
Gasoline and its vapors are highly flam- While many additives available may reduce mable and explosive. Keep away from deposits, Yamaha recommends the use of sparks, cigarettes, flames, or other sourc- Ring Free Fuel Additive, available from your es of ignition.
Operation NOTE: During engine operation place the tank hori- zontally, otherwise fuel cannot be drawn from the fuel tank. Squeeze the primer pump, with the arrow pointing up, until you feel it become firm. If there is a fuel joint on the motor, firmly connect the fuel line to the joint.
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Operation NOTE: The start-in-gear protection device prevents the engine from starting except when in neu- tral. Attach the engine shut-off cord to a se- cure place on your clothing, or your arm or leg. Then install the clip on the other end of the cord into the engine shut-off switch.
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Operation After the engine starts, slowly return the NOTE: manual starter handle to its original posi- The start-in-gear protection device prevents tion before releasing it. the engine from starting except when in neu- Slowly return the throttle grip to the fully tral.
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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. Push the starter button to start the motor. (Repeat if necessary.) Place the throttle grip in the “ ”...
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Operation Attach the engine shut-off cord to a se- cure place on your clothing, or your arm or leg. Then install the clip on the other end of the cord into the engine shut-off switch. EWM00121 WARNING Attach the engine shut-off cord to a se- cure place on your clothing, or your arm ZMU02030 or leg while operating.
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Operation ZMU01880 Open the throttle slightly without shifting NOTE: using the neutral throttle lever or free ac- It is not necessary to use the choke when celerator. You may need to change the starting a warm engine. throttle opening slightly depending on en- Push in the main switch fully, or the remote gine temperature.
Until the engine is warm, the idle level and add oil if necessary. Consult speed may be higher than normal. High your Yamaha dealer if the cause for the idle speed can prevent you from shifting low oil pressure-warning indicator can- back to neutral.
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Operation Move the remote control lever / gear shift NOTE: lever firmly and crisply forward (for for- Tiller handle models: The gear shift lever op- ward gear) or backward (for reverse erates only when the throttle grip is in the fully gear) [about 35°...
Operation EMU27820 Stopping engine Before stopping the engine, first let it cool off for a few minutes at idle or low speed. Stop- ping the engine immediately after operating at high speed is not recommended. EMU27833 Procedure Push and hold the engine stop button un- til the engine comes to a complete stop.
Operation EMU27861 Trimming outboard motor The trim angle of the outboard motor helps determine the position of the bow of the boat in the water. Correct trim angle will help im- prove performance and fuel economy while reducing strain on the engine. Correct trim an- gle depends upon the combination of boat, engine, and propeller.
Operation EMU27872 Adjusting trim angle for manual tilt NOTE: The outboard motor trim angle can be models changed approximately 4 degrees by shifting There are 4 or 5 holes provided in the clamp the trim rod one hole. bracket to adjust the outboard motor trim an- gle.
Operation also be adjusted to help offset this effect. When the bow of the boat is down, it is easier to accelerate from a standing start onto plane. Bow Up Too much trim-out puts the bow of the boat too high in the water. Performance and econ- omy are decreased because the hull of the boat is pushing the water and there is more air drag.
Operation the bow is greatly increased, heightening the ECM00241 CAUTION: danger of “bow steering” and making opera- Before tilting the outboard motor, stop tion difficult and dangerous. the engine by following the procedure on page 44. Never tilt the outboard mo- tor while the engine is running.
Operation Push the tilt support knob into the clamp bracket. Or the tilt support bar will turn to the lock position automatically. Press the power tilt switch “ ” (up) until the outboard motor has tilted up com- pletely. ECM01640 CAUTION: Do not use the tilt support lever or knob when trailering the boat.
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 Push the power tilt switch “ ” (down) to EMU28060 Cruising in shallow water lower the outboard motor to the desired The outboard motor can be tilted up partially position. to allow operation in shallow water. EMU28071 Cruising in shallow water (manual tilt models) EWM00710 WARNING...
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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 until the tilt support bar automatically returns to the free position. Slowly lower the outboard motor to the normal position. EMU32860 Power tilt models The outboard motor can be tilted up partially to allow operation in shallow water. EWM00660 WARNING Slightly tilt the outboard motor up to the...
Cruising in muddy or turbid water Yamaha strongly recommends that you use the optional chromium-plated water pump kit (available for V4 and large engines) if you use the outboard motor in water with a lot of sedi- ment in it, such as muddy or other turbid (cloudy) water.
Maintenance EMU34520 Transom height L: Specifications F6AMH 562 mm (22.1 in) F8CMH 562 mm (22.1 in) NOTE: T8DEH 557 mm (21.9 in) “(AL)” stated in the specification data below T8DPH 557 mm (21.9 in) represents the numerical value for the alumi- T8DPR 557 mm (21.9 in) Transom height X: num propeller installed.
T8DPR 21.0 Nm (15.5 ft-lb) (2.14 kgf-m) 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 EMU28223 dealer for further details. Transporting and storing out-...
Maintenance EMU28241 Storing outboard motor NOTE: The use of “Yamaha Fuel Conditioner and When storing your Yamaha outboard motor Stabilizer” eliminates the need to drain the for prolonged periods of time (2 months or fuel system. Consult your Yamaha dealer or...
In addition, fog- with oil is recommended. Contact your ging of the engine is mandatory to pre- Yamaha dealer for information about fogging vent excessive engine damage due to oil and procedures for your engine.
Maintenance Keep batteries away from fire, sparks, or open flames (for example: welding equipment, lighted cigarettes, and so on.) DO NOT SMOKE when charging or han- dling batteries. KEEP BATTERIES AND ELECTROLYTIC FLUID OUT OF REACH OF CHILDREN. Follow the manual of the battery for the han- dling of the battery.
When flushing the engine with the boat in chine servicing, this work should be done the water, tilting up the outboard motor until by your Yamaha dealer or other qualified it is completely out of the water will achieve mechanic.
When operating in salt water, muddy, other turbid (cloudy), acidic 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...
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Maintenance Initial Every Item Actions 20 hours 100 hours 300 hours 500 hours (3 months) (1 years) (3 years) (5 years) Inspection, cleaning or Engine oil filter (built replacement as neces- into oil pan) sary Fuel filter (disposal Replacement type) Inspection or replace- Fuel pump ment as necessary...
Inspection or replace- switch/choke switch ment as necessary Wire harness connec- Inspection or replace- tions/Wire coupler con- ment as necessary nections Inspection and clean- (Yamaha) Fuel tank ing as necessary EMU34450 Maintenance chart 2 Every Item Actions 1000 hours Guide exhaust/ex-...
Do not attempt to di- agnose any problems yourself. Instead, take NOTE: the outboard motor to a Yamaha dealer. You If a torque-wrench is not available when you should periodically remove and inspect the are fitting a spark plug, a good estimate of the...
Check for fuel leakage regularly. ter is found in the filter, replace it. For replace- If any fuel leakage is found, the fuel sys- ment of the fuel filter, consult your Yamaha tem must be repaired by a qualified me- dealer.
If you have difficulty veri- sition (not tilted). fying the idle speed, or the idle speed requires adjustment, consult a Yamaha dealer or other qualified mechanic. Verify whether the idle speed is set to specification. For idle speed specifica- tions, see page 55.
Engine oil leakage is abnormal. Check for oil leaks on the around the engine. NOTE: EMU32110 Checking propeller If any leaks are found, consult your Yamaha EWM01610 dealer. WARNING You could be seriously injured if the en- EMU34780 Checking power tilt system...
Maintenance EMU30661 Removing propeller EMU29196 Spline models Straighten the cotter pin and pull it out us- ing a pair of pliers. Remove the propeller nut, washer, and spacer (if equipped). 1. Cotter pin 2. Propeller nut 3. Washer ZMU01897 4. Propeller Checkpoints 5.
If the propeller nut does not align with the pro- tion and be lost. peller shaft hole after tightening to the speci- Apply Yamaha marine grease or a corro- fied torque, tighten the nut further to align it sion resistant grease to the propeller with the hole.
Put a new gasket on the gear oil drain pair of the lower unit seals. screw. Insert and tighten the gear oil drain screw. NOTE: For disposal of used oil, consult your Yamaha EMU29302 Cleaning fuel tank dealer. EWM00920 WARNING...
Do not paint anodes, as this would render them ineffective. NOTE: Inspect ground leads attached to external an- odes on equipped models. Consult a Yamaha dealer for inspection and replacement of inter- nal anodes attached to the power unit. ZMU03231 Remove the screws holding the fuel joint assembly.
Maintenance Avoid bodily contact with electrolytic fluid as it can cause severe burns or per- manent eye injury. Wear protective eye gear when handling or working near batteries. Antidote (EXTERNAL): SKIN - Flush with water. EYES - Flush with water for 15 minutes and get immediate medical attention.
1. Red cable NOTE: 2. Black cable Consult a Yamaha dealer when charging or 3. Battery re-charging batteries. EMU29370 Disconnecting the battery EMU29332...
Maintenance EMU29400 Coating the boat bottom A clean hull improves boat performance. The boat bottom should be kept as clean of marine growth as possible. If necessary, the boat bot- tom can be coated with an anti-fouling paint approved for your area to inhibit marine growth.
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 EWM01022 WARNING Use this procedure only in an emergen- cy to return to the nearest port for re- pairs. When the emergency starter rope is used to start the engine, the start-in- gear protection device does not operate. Make sure the remote control lever is in neutral.
Trouble Recovery Do not touch the ignition coil, spark plug wire, spark plug cap, or other electrical components when starting or operating the motor. You could get an electrical shock. EMU29562 Emergency starting engine Remove the top cowling. Remove the start-in-gear protection ca- ZMU01880 ble from the starter, if equipped.
EMU29760 Treatment of submerged motor If the outboard motor is submerged, immedi- ately take it to a Yamaha dealer. Otherwise some corrosion may begin almost immediate- If you cannot immediately take the outboard motor to a Yamaha dealer, follow the proce- dure below in order to minimize engine dam- age.