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F20D F25D FT25F OWNER’S MANUAL Read this manual carefully before operating this outboard motor. 6BP-28199-76-E0...
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EMU25053 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.
Any damage tain maximum enjoyment from your new resulting from neglect of these instructions is Yamaha. If you have any question about the not covered by warranty. operation or maintenance of your outboard Some countries have laws or regulations re- motor, please consult a Yamaha dealer.
Table of contents Safety information......1 Multiple batteries ....... 13 Without a rectifier or Rectifier Outboard motor safety ..... 1 Regulator ........13 Propeller ..........1 Propeller selection ......13 Rotating parts ........1 Start-in-gear protection ....14 Hot parts..........1 Engine oil requirements ....
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Table of contents Tilt support bar ........26 Cooling water ........44 Cowling lock lever(s) (turn type)..26 Warming up engine......44 Flushing device ......... 27 Manual start and electric start Alert indicator ........27 models ........... 44 Checks after engine warm up ..45 Instruments and indicators ....
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Table of contents Replacement parts ......60 Severe operating conditions....61 Maintenance chart 1......62 Maintenance chart 2......64 Greasing..........65 Cleaning and adjusting spark plug ..66 Checking fuel filter......67 Inspecting idle speed......67 Changing engine oil......68 Inspecting wiring and connectors ..
Safety information tor and the clamp bracket when the motor is EMU33623 Outboard motor safety trimmed or tilted. Keep body parts out of this Observe these precautions at all times. area at all times. Be sure no one is in this EMU36502 area before operating the power trim and tilt Propeller...
Overloading or incorrect weight Have an approved PFD on board for every distribution can compromise the boats han- occupant. Yamaha recommends that you dling and lead to an accident, capsizing or must wear a PFD whenever boating. At a...
Safety information EMU33773 EMU33881 Avoid collisions Passenger training Scan constantly for people, objects, and oth- Make sure at least one other passenger is er boats. Be alert for conditions that limit your trained to operate the boat in the event of an visibility or block your vision of others.
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. 1. Key number...
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General information ZMU06473 1. CE marking location ZMU06391 1. CE marking location ZMU06040...
Read all labels on the outboard motor and the boat. If you need any additional information, contact your Yamaha dealer. EMU33834 Warning labels If these labels are damaged or missing, contact your Yamaha dealer for replacements. F25DMH ZMU06594...
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General information F20DET, F25DE, F25DET, FT25FET ZMU06593...
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General information ZMU05746 EMU33913 Contents of labels EWM01672 The above warning labels mean as follows. WARNING Read Owner’s Manuals and labels. EWM01692 Wear an approved personal flotation WARNING device (PFD). Emergency starting does not have start- Attach engine shut-off cord (lanyard) to ...
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General information Electrical hazard EMU33844 Symbols The following symbols mean as follows. Notice/Warning ZMU05666 Remote control lever/gear shift lever operat- ing direction, dual direction ZMU05696 Read Owner’s Manual ZMU05667 Engine start/ Engine cranking ZMU05664 Hazard caused by continuous rotation ZMU05668 ZMU05665...
Specifications and requirements FT25FET 536 mm (21.1 in) EMU34522 Specifications Dry weight (AL) S: TIP: F25DE 78 kg (172 lb) “(AL)” stated in the specification data below F25DMH 77 kg (170 lb) Dry weight (AL) L: represents the numerical value for the alumi- F20DET 82 kg (181 lb) num propeller installed.
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Specifications and requirements F25DET Remote steering FT25FET Power trim and tilt F25DMH Tiller handle Propeller mark: FT25FET Remote steering F20DET F Starting system: F25DE F F20DET Electric starter F25DET F F25DE Electric starter F25DMH F F25DET Electric starter FT25FET G Fuel and oil: F25DMH Manual starter FT25FET Electric starter...
F25DMH Vibration on tiller handle is working correctly and you should dis- under 2.5 m/s continue using the outboard. Contact EMU33555 your Yamaha dealer. Installation requirements The remote control unit must be equipped EMU33565 Boat horsepower rating with a start-in-gear protection device(s). This...
Your Yamaha dealer can help you select the Fire, explosion or sparks could result. right propeller for your boating needs. Select a propeller that will allow the engine to reach...
3. Type of propeller (propeller mark) ZMU06854 EMU25771 Start-in-gear protection Recommended engine oil grade 2 Yamaha outboard motors or Yamaha-ap- proved remote control units are equipped 122˚F with start-in-gear protection device(s). This 50˚C feature permits the engine to be started only 15W–40...
EMU36881 Muddy or acidic water or premium unleaded fuel. Yamaha strongly recommends that you have Recommended fuel: your dealer install the optional chromium- Regular unleaded gasoline plated water pump kit if you use the outboard Min.
(including metric sizes), and electrical tape. Waterproof flashlight with extra batteries. An extra engine shut-off cord (lanyard) with clip. Spare parts, such as an extra set of spark plugs. Consult your Yamaha dealer for details.
Components EMU2579Z Components diagram TIP: * May not be exactly as shown; also may not be included as standard equipment on all mod- els (order from dealer). F25DMH ZMU06597 1. Top cowling 16. Engine stop button/Engine shut-off switch 2. Cowling lock lever 17.
Components F20DET, F25DE, F25DET, FT25FET ZMU06602 EMU25804 1. Top cowling Fuel tank 2. Cowling lock lever If your model was equipped with a portable 3. Idle hole fuel tank, its function is as follows. 4. Drain screw EWM00021 5. Anti-cavitation plate WARNING 6.
Components 1. Fuel joint 1. Power trim and tilt switch 2. Fuel gauge 2. Remote control lever 3. Fuel tank cap 3. Neutral interlock trigger 4. Air vent screw 4. Neutral throttle lever 5. Main switch EMU25831 6. Engine shut-off switch Fuel joint 7.
Components when the neutral throttle lever is in the closed 6. Throttle position. 7. Fully open EMU25914 Tiller handle EMU26202 Neutral interlock trigger To change direction, move the tiller handle to To shift out of neutral, first pull the neutral in- the left or right as necessary.
Components or throttle grip, which could result in an accident. [EWM00033] ZMU03034 ZMU03169 EMU25963 Throttle indicator The fuel consumption curve on the throttle indicator shows the relative amount of fuel consumed for each throttle position. Choose the setting that offers the best performance and fuel economy for the desired operation.
Components tangled, preventing it from functioning. Avoid accidentally pulling the cord dur- ing 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.
Components automatically to the “ ” (on) position. specified torque. ZMU06497 EMU31433 1. Nut Steering friction adjuster A friction device provides adjustable resis- Nut tightening torque: tance to the steering mechanism, and can be 4.0 Nm (0.41 kgf-m, 3.0 ft-lb) set according to operator preference.
Components ZMU06495 EMU26156 Power trim and tilt switch on bottom 1. Power trim and tilt switch cowling EMU26245 The power trim and tilt switch is located on Trim tab with anode the side of the bottom cowling. Pushing the EWM00841 switch “...
Components ZMU02822 ZMU06498 1. Trim tab 1. Trim tab 2. Bolt 2. Bolt Bolt tightening torque: Bolt tightening torque: 18 Nm (1.84 kgf-m, 13.3 ft-lb) 8 Nm (0.82 kgf-m, 5.9 ft-lb) EMU26254 EMU26263 Trim tab Trim rod (tilt pin) The position of the trim rod determines the EWM00841 WARNING minimum trim angle of the outboard motor in...
Components EMU26334 Tilt support bar The tilt support bar keeps the outboard motor in the tilted up position. ZMU06500 1. Tilt lock lever To tilt the outboard motor up, set the tilt lock ZMU06503 lever to the “ ” (up) position. To tilt the out- ECM01661 board motor down, set the tilt lock lever to the NOTICE...
Components ZMU04041 ZMU06506 1. Cowling lock lever(s) 1. Alert indicator EMU26464 Flushing device This device is used to clean the cooling wa- ter passages of the motor using a garden hose and tap water. ZMU06505 1. Flushing device TIP: For details on usage, see page 59. EMU26305 Alert indicator If the engine develops a condition which is...
Instruments and indicators EMU36016 Indicators EMU36025 Low oil pressure-alert indicator If oil pressure drops too low, this indicator will light up. For further information, see page 29. ECM00023 NOTICE Do not continue to run the engine if the low oil pressure-alert indicator is on ZMU06257 and the engine oil level is lower.
Check the cooling water inlet for clogging. Do not continue to operate the engine if a alert device has activated. Consult your Yamaha dealer if the problem cannot be located and corrected. EMU2681D Overheat alert This engine has an overheat-alert device. If the engine temperature rises too high, the alert device will activate.
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If the alert system has activated, stop the en- gine as soon as it is safe to do so. Check the oil level and add oil as needed. If the oil level is correct and the alert device does not switch off, consult your Yamaha dealer.
Installation EMU26903 Installation The information presented in this section is intended as reference only. It is not possible to provide complete instructions for every possible boat and motor combination. Proper mounting depends in part on experience and the specific boat and motor combination. EWM01591 WARNING ZMU01760...
Test runs at different heights can help de- off the transom. termine the optimum mounting height. Consult your Yamaha dealer or boat man- ufacturer for further information on deter- mining the proper mounting height. For instructions on setting the trim angle of ...
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Installation packaging. If used, they must be of at least the same quality of material and strength and must be tightened se- curely. After tightening, test run the engine and check their tightness. [EWM00652] ZMU02637 1. Bolts...
Operation procedure could result in reduced engine EMU36382 First-time operation life or even severe engine damage. [ECM00802] EMU36393 EMU27086 Fill engine oil Procedure for 4-stroke models Your new engine requires a period of 10 The engine is shipped from the factory with- hours break-in to allow mating surfaces of out engine oil.
If any water is found in the fuel, or if a ver and lift off the top cowling. significant amount of debris is found, the fuel tank should be checked and cleaned by a Yamaha dealer. ZMU06085 EMU36443 Fuel system...
Operation turns smoothly and that it completely re- turns to the fully closed position. Look for loose or damaged connections of the throttle cable and shift link. Remote control models: Turn the steering wheel full-right and full- left. Make sure operation is smooth and unrestricted throughout the whole range with no binding or excessive free play.
Check that the oil level on the oil dipstick is between the upper and lower marks. ZMU06517 Consult your Yamaha dealer if the oil 1. Fitting level is not at the proper level or if it ap- 2. Flushing device pears milky or dirty.
Operate each of the power trim and tilt top cowling is loose, have it repaired by your switches to check that all switches work. Yamaha dealer. Tilt the outboard motor up and check that the trim and tilt rod is pushed out completely.
Operation injury or death. Handle gasoline with If you use a portable container to store care. Never siphon gasoline by mouth. and dispense fuel, use only an approved If you should swallow some gasoline or GASOLINE container. inhale a lot of gasoline vapor, or get Touch the fuel nozzle to the filler open- some gasoline in your eyes, see your ing or funnel to help prevent electrostatic...
Operation open flames and sparks while loosen- ing the air vent screw. This product emits exhaust gases which contain carbon monoxide, a col- orless, odorless gas which could cause brain damage or death when inhaled. Symptoms include nausea, dizziness, and drowsiness.
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Operation EMU39013 Manual start/prime start models EWM01841 WARNING Failure to attached engine shut-off cord could result in a runaway boat if opera- tor is ejected. Attach the engine shut- off cord to a secure place on your cloth- ing, or your arm or leg while operating. Do not attach the cord to clothing that ZMU02026 could tear loose.
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Operation warmed up. For further information, see page 44. Slowly return the throttle grip to the fully closed position. Starting procedure (warm engine) Place the gear shift lever in neutral. ZMU06609 TIP: If the throttle is opened too much, the en- ...
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Operation ZMU06523 After the engine starts, slowly return the TIP: 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- Loosen the throttle friction adjuster and tral.
Immediately after the engine starts, re- case or the cooling water pilot hole is lease the main switch and allow it to re- blocked. Consult your Yamaha dealer if ” (on). NOTICE: Never turn turn to “ the problem cannot be located and cor- the main switch to “...
Operation if necessary. Consult your Yamaha dealer if the cause for the low oil pressure alert cannot be found. [ECM01832] EMU36532 Checks after engine warm up EMU36542 Shifting While the boat is tightly moored, and without applying throttle, confirm that the engine shifts smoothly into forward and reverse, and 1.
Operation tral position. ZMU06531 TIP: Tiller handle models: The gear shift lever op- erates only when the throttle grip is in the ful- ly closed position. To shift from in gear (forward/reverse) to neutral Close the throttle so that the engine slows to idle speed.
Operation wind direction. EMU27822 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. EMU27848 Procedure Push and hold the engine stop button or ZMU06533 turn the main switch to “...
Operation trim angle. Tilt the outboard motor up and remove the trim rod by pressing clip. 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.
Operation your boat and operating conditions. “ ” (up). TIP: To lower the bow (trim-in), press the switch “ ” (down). The outboard motor trim angle can be Make test runs with the trim set to different changed approximately 4 degrees by shifting angles to find the position that works best for the trim rod one hole.
Operation EWM00223 WARNING Make sure that no one is near the out- board motor when tilting the outboard motor up or down. Otherwise, body parts could be crushed between the outboard motor and the clamp bracket. EWM00251 WARNING Leaking fuel is a fire hazard. If there is a Bow Down fuel joint on the outboard motor, discon- Too much trim-in causes the boat to “plow”...
Operation NOTICE: Do not use the tilt support lever or knob when trailering the boat. The outboard motor could shake loose from the tilt support and fall. If the motor cannot be trailered in the normal running position, use an additional support device to secure it in the tilt position.
Operation ZMU06543 EMU30193 Procedure for tilting down (manual tilt models) Place the tilt lock lever in the lock posi- tion. ZMU06537 Push the tilt support knob into the clamp bracket to support the engine. WARN- ING! After tilting the outboard motor, be sure to support it with the tilt sup- ZMU02306 port knob or tilt support lever.
Operation speed when using the shallow water cruising system. The tilt lock mecha- nism does not work while the shallow water cruising system is being used. Hitting an underwater obstacle could cause the outboard motor to lift out of the water, resulting in loss of control. Use extra care when operating in re- ...
Operation ZMU03087 ZMU04851 To return the outboard motor to the nor- mal running position, place the remote control lever / gear shift lever in neutral. Place the tilt lock lever in the lock/down position, then slightly tilt the outboard motor up until the tilt support bar auto- matically returns to the free position.
Cruising in muddy, turbid, or acidic water Yamaha strongly recommends that you use the optional chromium-plated water pump kit (see page 15) if you use the outboard motor in acidic water or water with a lot of sediment in it, such as muddy or turbid (cloudy) water.
Leaking fuel is a fire hazard. When such as a transom saver bar. Consult your transporting and storing the outboard Yamaha dealer for further details. motor, disconnect the fuel line from the outboard motor to prevent fuel from EMU28237 Clamp screw mounting models leaking.
Place a towel or something similar under the outboard motor to protect it from damage. EMU28242 Storing outboard motor When storing your Yamaha outboard motor for prolonged periods of time (2 months or longer), several important procedures must be performed to prevent excessive damage.
If the “Fogging Oil” is not available, run the Seal replacement should be performed engine at idle speed until the fuel system be- by an authorized Yamaha dealer prior to comes empty and the engine stops. Remove...
Grease all grease fittings. For further de- tails, see page 65. TIP: For long-term storage, fogging the engine with oil is recommended. Contact your Yamaha dealer for information about fogging oil and procedures for your engine. EMU28446 Flushing power unit Perform this procedure right after operation for the most thorough flushing.
Maintenance cessories are available from your Yamaha dealer. EMU34152 Severe operating conditions Severe operating conditions involve one or more of the following types of operation on a regular basis: Operating continuously at or near maxi- mum engine speed (rpm) for many hours Operating continuously at a low engine ...
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 year) (3 years) (5 years) Inspection or replace- Fuel line ment as necessary Inspection or replace- Fuel pump ment as necessary Fuel/engine oil leakage Inspection Gear oil Replacement...
When removing or installing a spark Instead, take the outboard motor to a plug, be careful not to damage the in- Yamaha dealer. You should periodically re- sulator. A damaged insulator could move and inspect the spark plug because...
DPR6EB-9 replace it. For cleaning or replacement of the fuel filter, consult your Yamaha dealer. Be sure to use the specified spark plug, otherwise the engine may not operate properly. Before fitting the spark plug, measure the electrode gap with a wire thickness gauge;...
For idle speed specifications, see page 10. If you have difficulty verifying the idle speed, or the idle speed requires adjustment, consult a Yamaha dealer or other qualified mechanic. EMU38807 Changing engine oil...
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Consult your Add the correct amount of oil through the Yamaha dealer if the oil level is out of filler hole. Put back the filler cap and the specified level.
” (off) and remove the key, For more information on the disposal of and remove the clip from the engine shut- used oil, consult your Yamaha dealer. off switch. Turn off the battery cut-off Change the oil more often when operating ...
Maintenance ZMU06564 ZMU01897 Checkpoints 1. Cotter pin Check each of the propeller blades for ero- 2. Propeller nut sion from cavitation or ventilation, or other 3. Washer 4. Spacer damage. 5. Propeller Check the propeller shaft for damage. 6.
EWM00801 ation and be lost. WARNING Apply Yamaha marine grease or a corro- Be sure the outboard motor is securely sion resistant grease to the propeller fastened to the transom or a stable shaft.
If the gear oil is milky or contains water or a large amount of metal particles, the gear case may be damaged. Have a ZMU03274 Yamaha dealer check and repair the outboard motor. Put a new gasket on the oil level plug. [ECM00714] TIP:...
EMU29317 ZMU03418 Inspecting and replacing anode(s) Yamaha outboard motors are protected from corrosion by sacrificial anodes. Inspect the external anodes periodically. Remove scales from the surfaces of the anodes. Consult a Yamaha dealer for replacement of external anodes.
Consult a tery’s charge. If the battery needs charg- Yamaha dealer for inspection and replace- ing, consult your Yamaha dealer. ment of internal anodes attached to the pow- Check the battery connections. They er unit.
Maintenance ZMU01811 1. Red cable 2. Black cable 3. Battery The electrical contacts of the battery and cables must be clean and properly con- nected, or the battery will not start the engine. EMU29372 Disconnecting the battery Turn off the battery cut-off switch (if equipped) and main switch.
Q. Has fuel pump malfunctioned? If your outboard motor requires repair, bring A. Have serviced by a Yamaha dealer. it to your Yamaha dealer. If the engine trouble-alert indicator is flash- Q. Are spark plug(s) fouled or of incorrect ing, consult your Yamaha dealer.
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Q. Is fuel contaminated or stale? A. Fill tank with clean, fresh fuel. Q. Is carburetor clogged? A. Have serviced by a Yamaha dealer. Q. Is fuel filter clogged? A. Clean or replace filter. Q. Is fuel joint connection incorrect? 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 A. Have serviced by a Yamaha dealer. other obstructions in fuel system. Q. Is there excess water in fuel filter cup? Q.
EWM00632 Q. Is steering pivot loose or damaged? WARNING A. Tighten or have serviced by a Yamaha Substituting an incorrect fuse or a piece dealer. of wire could allow excessive current EMU29434 flow.
Trouble Recovery ZMU04095 ZMU06565 1. Manual valve screw 1. Fuse puller 2. Cap Put the engine in the desired position, 3. Fuse (20 A, 30 A) then tighten the manual valve screw by 4. Spare fuse (20 A, 30 A) turning it counterclockwise.
Trouble Recovery ing normal operation. Loss of engine the manual starter. 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. Make sure no one is standing behind ...
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Trouble Recovery ZMU02026 ZMU06579 Insert the knotted end of the emergency Pass the start-in-gear protection cable starter rope into the notch in the flywheel under the fuel line and remove the magnet and wind the rope 1 or 2 turn(s) spring from it.
Trouble Recovery and that the clip is attached to the en- EMU38852 Emergency starting engine (electric gine shut-off switch. The main switch start model) must be “ ” (on), if equipped. Remove the top cowling and protective cover. ZMU06585 Pull off the 10-pin connector from the clamp and remove the flywheel magnet cover (if equipped).
EMU33502 Treatment of submerged motor If the outboard motor is submerged, immedi- ately take it to a Yamaha dealer. Otherwise some corrosion may begin almost immedi- ately. NOTICE: Do not attempt to run the outboard motor until it has been com- pletely inspected.
INDEX Engine, checking ........37 Engine oil ..........36 Alcohol and drugs ........2 Engine oil, changing ......68 Alert indicator........27 Engine oil, filling ........34 Alert system .......... 29 Engine oil requirements ......14 Anode(s), inspecting and replacing ..74 Engine shut-off cord (lanyard) ..
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INDEX Power trim and tilt will not operate ..81 Propeller ..........1 Laws and regulations......3 Propeller, checking ....... 70 Low oil pressure alert......29 Propeller, installing ....... 71 Low oil pressure-alert indicator..... 28 Propeller, removing....... 71 Lubrication ..........58 Propeller selection ........
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INDEX Top cowling, installing......37 Top cowling, removing......35 Transporting and storing outboard motor ..........56 Trimming outboard motor ..... 47 Trim rod (tilt pin)........25 Trim tab..........25 Trim tab with anode ......24 Troubleshooting ........77 Warming up engine....... 44 Warning labels ........
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