6BP-9-11 Hyoshi 背巾4mm 09.2.19 9:09 ページ 1 F25 T25 OWNER’S MANUAL Printed in Japan February 2009–0.8 × 1 ! Printed on recycled paper q Read this manual carefully before operating this outboard motor. U.S.A.
6BP-9-11 Hyoshi 背巾4mm 09.2.19 9:09 ページ 2 EMU25062 ZMU01690 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.
Important manual information EMU31283 To the owner Thank you for choosing a Yamaha outboard motor. This Owner’s Manual contains information needed for proper operation, maintenance 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.
Table of contents Safety information............................. 1 Outboard motor safety .................... 1 Propeller............................................ 1 Rotating parts.................................... 1 Hot parts ........................................... 1 Electric shock .................................... 1 Power trim and tilt ............................. 1 Engine shut-off cord (lanyard)........... 1 Gasoline ............................................
Table of contents Trim tab with anode ........................ 32 Trim tab ........................................... 32 Trim rod (tilt pin) .............................. 33 Tilt lock mechanism......................... 33 Tilt support knob ............................. 33 Tilt support bar ................................ 34 Cowling lock lever(s) (turn type)...... 34 Flushing device ............................... 34 Alert indicator .................................. 34 Instruments and indicators ........
Table of contents Replacement parts .......................... 73 Maintenance interval guidelines...... 73 Maintenance chart 1 ....................... 74 Maintenance chart 2 ....................... 76 Greasing ......................................... 77 Cleaning and adjusting spark plug ............................................... 78 Checking fuel filter .......................... 79 Inspecting idling speed ................... 79 Changing engine oil ........................
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 neutral, and sharp edges of the propeller can cut even when stationary. ● Stop the engine when a person is in the water near you. ● Keep people out of reach of the propeller, even when the engine is off.
Safety information 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, immediately wash with soap and water. Change clothing if gasoline spills on it. If you swallow gasoline, inhale a lot of gasoline vapor, or get gasoline in your eyes, get immediate medical attention. Never siphon fuel by mouth.
Safety information 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. ZMU06025 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.
Safety information go to boatus.org. 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. EMU33590 Laws and regulations Know the marine laws and regulations where you will be boating- and obey them.
Safety information EMU33700 Steering and sailing rules and sound signals Whenever two vessels on the water meet one another, one vessel has the right-ofway; it is called the “stand-on” vessel. The vessel that does not have the right-of-way is called the “give-way” or “burdened”vessel. These rules determine which vessel has the right-of-way, and what each vessel should do. Stand-on vessel The vessel with the right-of-way has the duty to continue its course and speed, except to avoid an immediate collision.
Safety information EMU25531 Other special situations Crossing When two power driven vessels are crossing each other’s 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.
Safety information 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, numbers 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 being entered from seaward (the boater is going towards the port).
Safety information ZMU01708 8
General information EMU25171 Identification numbers record EMU25183 Outboard motor serial number The outboard motor serial number is stamped on the label attached to the port side of the clamp bracket. Record your outboard motor serial number in the spaces provided to assist you in ordering spare parts from your Yamaha dealer or for reference in case your outboard motor is stolen. 1. Key number 1 ZMU06472 1.
General information EMU33520 Read manuals and labels Before operating or working on this 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. EMU33831 Warning labels If these labels are damaged or missing, contact your Yamaha dealer for replacements.
General information F25EHA, F25MHA 1 2 3 ZMU06475 11
General information 1 2 3 ZMU05670 12
General information EMU33843 Symbols The following symbols mean as follows.
Specifications and requirements EMU34520 Specifications TIP: “(AL)” stated in the specification data below represents the numerical value for the aluminum propeller installed. Likewise, “(SUS)” represents the value for stainless steel propeller installed and “(PL)” for plastic propeller installed. TIP: “*” means, select the engine oil referring to the chart of engine oil paragraph. For further information, see page 18. EMU2821D Dimension: Overall length: F25A 724 mm (28.5 in) F25EA 724 mm (28.
Specifications and requirements F25EHA Electric F25MHA Manual T25A Electric Starting carburetion system: Prime start Valve clearance (cold engine) IN: 0.15–0.25 mm (0.0059–0.0098 in) Valve clearance (cold engine) EX: 0.25–0.35 mm (0.0098–0.0138 in) Min. cold cranking amps (CCA/SAE): F25A 245.0 A F25EA 245.0 A F25EHA 245.0 A T25A 245.0 A Min. marine cranking amps (MCA/ABYC): F25A 323.0 A F25EA 323.0 A F25EHA 323.0 A T25A 323.0 A Min.
Specifications and requirements 27.0 Nm (2.75 kgf-m, 19.9 ft-lb) Engine oil filter: 18.0 Nm (1.84 kgf-m, 13.3 ft-lb) EMU33554 Installation requirements EMU33563 Boat horsepower rating EWM01560 WARNING Overpowering a boat can cause severe instability. start-in-gear protection device is not working correctly and you should discontinue using the outboard. Contact your Yamaha dealer. The remote control unit must be equipped with a start-in-gear protection device(s).
Specifications and requirements damage. EMU36290 Mounting battery Mount the battery holder securely in a dry, well-ventilated, vibration-free location in the boat. WARNING! Do not put flammable items, or loose heavy or metal objects in the same compartment as the battery. Fire, explosion or sparks could result.
Specifications and requirements following chart according to the average temperatures in your area. x 1 2 3 ZMU04606 1. Propeller diameter in inches 2. Propeller pitch in inches 3. Type of propeller (propeller mark) EMU25770 Start-in-gear protection Yamaha outboard motors or Yamaha-approved 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. Always select neutral before starting the engine.
Specifications and requirements has been stored in clean containers. Gasohol There are two types of gasohol: gasohol containing ethanol (E10) and that containing methanol. Ethanol can be used if the ethanol content does not exceed 10% and the fuel meets the minimum octane ratings. E85 is a fuel containing 85% ethanol and must not be used in your outboard motor. All ethanol blends containing more than 10% ethanol can cause fuel system damage or cause engine starting and running problems.
Specifications and requirements 1 ZMU06478 EMU36341 Motor disposal requirements 1. Approval label location Never illegally discard (dump) the motor. Yamaha recommends consulting the dealer about discarding the motor. EMU36351 Emergency equipment Keep the following items onboard in case there is trouble with the motor. ● A tool kit with assorted screwdrivers, pliers, wrenches (including metric sizes), and electrical tape. ● Waterproof flashlight with extra batteries.
Specifications and requirements EMU25280 1 ZMU06391 One Star—Low Emission The one-star label identifies engines that meet the Air Resources Board’s 2001 exhaust emission standards. Engines meeting these standards have 75% lower emissions than conventional carbureted two-stroke engines. These engines are equivalent to the U.S. EPA’s 2006 standards for marine engines. 1.
Specifications and requirements these standards have 65% lower emissions than One Star-Low-Emission engines. ZMU01704 EMU33861 Four Stars—Super Ultra Low Emission The four-star label identifies engines that meet the Air Resources Board’s Sterndrive and Inboard marine engine 2009 exhaust emission standards. Personal Watercraft and Outboard marine engines may also comply with these standards. Engines meeting these standards have 90% lower emissions than One Star-Low-Emission engines.
Components EMU2579M Components diagram TIP: * May not be exactly as shown; also may not be included as standard equipment on all models. F25A, F25EA, T25A 1 13 11 2 10 9 12 3 11 4 13 5 6 14 15 16 17 8 7 1. Top cowling 2. Cowling lock lever 3. Idle hole 4. Drain screw 5. Anti-cavitation plate 6. Trim tab 7. Propeller 8. Cooling water inlet 9. Clamp bracket 10. Power trim and tilt switch* 11. Alert indicator(s) 12. Tilt support knob* 13. Flushing device 14. Clamp screw* 15.
Components F25EHA, F25MHA 1 12 13 1 17 22 11 21 2 10 9 20 19 18 3 1 5 6 8 13 17 21 23 24 20 7 24 15 14 4 22 1. Top cowling 2. Cowling lock lever 3. Idle hole 4. Drain screw 5. Anti-cavitation plate 6. Trim tab 7. Propeller 8. Cooling water inlet 9. Trim rod 10. Clamp bracket 11. Restraint cable attachment 12. Manual starter handle* 13. Gear shift lever 14. Throttle grip 15. Throttle friction adjuster 16. Engine stop button/Engine shut-off switch 17. Clip 18. Alert indicator(s) 19.
Components 2 1 4 3 ZMU02284 1. Fuel joint 2. Fuel gauge 3. Fuel tank cap 4. Air vent screw EMU25830 Fuel joint 1. Power trim and tilt switch 2. Remote control lever 3. Neutral interlock trigger 4. Neutral throttle lever 5. Main switch 6. Engine shut-off switch 7. Throttle friction adjuster This joint is used to connect the fuel line. EMU25841 EMU26190 Fuel gauge Remote control lever This gauge is located on either the fuel tank cap or on the fuel joint base.
Components 6. Throttle 7. Fully open EMU26201 Neutral interlock trigger To shift out of neutral, first pull the neutral interlock trigger up. 1. Fully open 2. Fully closed EMU25911 Tiller handle To change direction, move the tiller handle to the left or right as necessary. 1. Neutral interlock trigger EMU26211 Neutral throttle lever To open the throttle without shifting into either forward or reverse, put the remote control lever in the neutral position and lift the neutral throttle lever.
Components moves ahead. Pushing the lever away from you puts the engine in reverse gear so that the boat moves astern. R3 N 2 1F ZMU03034 ZMU06486 1. Forward “ ” 2. Neutral “ ” 3. Reverse “ ” EMU25961 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. 1 1. Forward “ ” 2. Neutral “ ” 3.
Components ZMU02001 1. Throttle indicator EMU25975 Throttle friction adjuster A friction device provides adjustable resistance to movement of the throttle grip or the remote control lever, and can be set according to operator preference. To increase resistance, turn the adjuster clockwise. To decrease resistance, turn the adjuster counterclockwise. WARNING! Do not overtighten the friction adjuster.
Components 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. [EWM00122] 1. Cord 2. Clip 3. Engine shut-off switch EMU26001 Engine stop button To open the ignition circuit and stop the engine, push this button. 1. Cord 2. Clip 3. Engine shut-off switch 2 3 ZMU02083 1 ZMU02003 1. Cord 2. Clip 3.
Components dle out until resistance is felt. From that position, then pull the handle straight out quickly to crank the engine. sition, the starter motor turns to start the engine. When the key is released, it returns automatically to the “ ” (on) position. ZMU06523 EMU26080 Starter button To start the engine with the electric starter, push the starter button.
Components EMU26143 Power trim and tilt switch on remote control or tiller handle A B ZMU06496 If the resistance does not increase even when the lever is turned to the port side “A”, make sure that the nut is tightened to the specified torque. The power trim and tilt system adjusts the outboard motor angle in relation to the transom. Pressing the switch “ ” (up) trims the outboard motor up, and then tilts it up. Pressing the switch “ ” (down) tilts the outboard motor down and trims it down.
Components down and trims it down. When the switch is released, the outboard motor will stop in its current position. For instructions on using the power trim and tilt switch, see page 62. EWM01030 WARNING Use the power trim and tilt switch located on the bottom engine cowling only when the boat is at a complete stop with the engine off.
Components steering control can be turned to either the right or left by applying the same amount of force. If the boat tends to veer to the left (port side), turn the trim tab rear end to the port side “A” in the figure. If the boat tends to veer to the right (starboard side), turn the trim tab end to the starboard side “B” in the figure. A EMU30440 Tilt lock mechanism The tilt lock mechanism is used to prevent the outboard motor from lifting out of the water when in reverse gear.
Components port 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. EMU26332 Tilt support bar The tilt support bar keeps the outboard motor in the tilted up position. 1 ZMU04041 1. Cowling lock lever(s) EMU26460 Flushing device This device is used to clean the cooling water passages of the motor using a garden hose and tap water. ZMU06503 ECM01660 TIP: For details on usage, see page 71.
Components 1 ZMU06506 1.
Instruments and indicators EMU36014 Indicators EMU36024 Low oil pressure-alert indicator If oil pressure drops too low, this indicator will light up. For further information, see page 37. 1 ECM00022 NOTICE ● ● Do not continue to run the engine if the low oil pressure-alert indicator is on and the engine oil level is lower. Serious engine damage will occur. The low oil pressure-alert indicator does not indicate the engine oil level. Use the oil dipstick to check the remaining oil quantity.
Engine control system gine and check the cooling water inlets: ● Check trim angle to be sure that the cooling water inlet is submerged. ● Check the cooling water inlet for clogging. EMU26803 Alert system ECM00091 NOTICE 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. EMU2681A Overheat alert This engine has an overheat-alert device. If the engine temperature rises too high, the alert device will activate.
Engine control system ZMU02360 If the alert system has activated, stop the engine 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 EMU26902 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. EWM01590 1 WARNING ● ● Overpowering a boat could cause severe instability. Do not install an outboard motor with more horsepower than the maximum rating on the capacity plate of the boat.
Installation EMU26972 Clamping the outboard motor 1. ECM01631 NOTICE ● ● Check that the idle hole stays high enough to keep out water getting inside engine even if the boat is in stationary with maximum load. Incorrect engine height or obstructions to the smooth flow of water (such as the design or condition of the boat, or accessories such as transom ladders or depth finder transducers) can create airborne water spray while the boat is cruising.
Installation ZMU02013 3. Secure the clamp bracket to the transom using the bolts provided with the outboard (if packed). For details, consult your Yamaha dealer. WARNING! Avoid using bolts, nuts or washers other than those contained in the engine packaging. If used, they must be of at least the same quality of material and strength and must be tightened securely. After tightening, test run the engine and check their tightness. [EWM00651] 1 ZMU02637 1.
Operation EMU36381 First-time operation EMU36391 Fill engine oil The engine is shipped from the factory without engine oil. If your dealer did not fill the oil, you must fill it before starting the engine. NOTICE: Check that the engine is filled with oil before first-time operation to avoid severe engine damage. [ECM01781] The engine is shipped with the following sticker, which should be removed after engine oil is filled for the first time.
Operation A good rule is to use 1/3 of your fuel to get to the destination, 1/3 to return, and to keep 1/ 3 as an emergency reserve. With the boat level on a trailer or in the water, check the fuel level. For fuel filling instructions, see page 46. EMU36570 Remove cowling For the following checks, remove the top cowling from the engine. To remove the engine top cowling, release the lock lever and lift off the cowling. EMU36451 Check for fuel leaks Check for fuel leaks or gasoline fumes in the boat.
Operation ● make sure there is no hesitation in their travel. Operation should be smooth over the complete range of motion, and each lever should return completely to the idle position. Look for loose or damaged connections of the throttle and shift cables. 1. Cord 2. Clip 3. Engine shut-off switch ZMU06590 2 3 1 ZMU02003 ZMU06589 1. Cord 2. Clip 3. Engine shut-off switch EMU36481 Engine shut-off cord (lanyard) Inspect the engine shut-off cord for damage, such as cuts, breaks, and wear. 1.
Operation EMU27166 3. Upper level mark Engine oil 1. Put the outboard motor in an upright position (not tilted). NOTICE: If the motor is not level, the oil level indicated on the dipstick may not be accurate. 4. Engine ● ● ● [ECM01790] 2. 3. EMU27153 Remove oil dipstick and wipe it clean. Insert the dipstick and remove it again. Be sure to completely insert the dipstick into the dipstick guide, otherwise the oil level measurement will be incorrect.
Operation installed correctly, water spray under the cowling can damage the engine, or the cowling can blow off at high speeds. [ECM01990] motor before performing this check. 1. Check the power trim and tilt unit for any sign of oil leaks. 1 ZMU02828 ZMU06110 After installing, check the fitting of the top cowling by pushing it with both hands. If the top cowling is loose, have it repaired by your Yamaha dealer. 1. Trim and tilt rod 2. 3. 4. 5.
Operation ● 1. 2. mable and explosive. Always refuel according to this procedure to reduce the risk of fire and explosion. Gasoline is poisonous and can cause injury or death. Handle gasoline with care. Never siphon gasoline by mouth. If you should swallow some gasoline or inhale a lot of gasoline vapor, or get some gasoline in your eyes, see your doctor immediately. If gasoline spills on your skin, wash with soap and water. If gasoline spills on your clothing, change your clothes. 5. 6. 7. 8.
Operation ● ● water near you. When the air vent screw is loosened, gasoline vapor will be released. Gasoline is highly flammable, and its vapors are flammable and explosive. Refrain from smoking, and keep away from open flames and sparks while loosening the air vent screw. This product emits exhaust gases which contain carbon monoxide, a colorless, odorless gas which could cause brain damage or death when inhaled. Symptoms include nausea, dizziness, and drowsiness.
Operation EMU27493 TIP: Starting engine EWM01600 WARNING Before starting the engine, make sure that the boat is tightly moored and that you can steer clear of any obstructions. Be sure there are no swimmers in the water near you. The start-in-gear protection device prevents the engine from starting except when in neutral. 2. Attach the engine shut-off cord to a secure 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.
Operation ZMU02026 ZMU06523 5. After the engine starts, slowly return the manual starter handle to its original position before releasing it. 3. Open the throttle grip as shown in the illustration. TIP: When the engine is cold, it needs to be warmed up. For further information, see page 55. 6. Slowly return the throttle grip to the fully closed position. Starting procedure (warm engine) 1. Place the gear shift lever in neutral.
Operation ● ZMU06608 5. Pull the manual starter handle slowly until you feel resistance. Then give a strong pull straight out to crank and start the engine. Repeat if necessary. 1. off cord to a secure place on your clothing, or your arm or leg while operating. Do not attach the cord to clothing that could tear loose. Do not route the cord where it could become entangled, preventing it from functioning. Avoid accidentally pulling the cord during normal operation.
Operation 3. Place the throttle grip in the “ ” (start) position. After the engine starts, return the throttle to the fully closed position. keep the starter motor turning for more than 5 seconds. If the starter motor is turned continuously for more than 5 seconds, the battery will be quickly discharged, thus making it impossible to start the engine. The starter can also be damaged.
Operation N ZMU06522 ZMU06521 4. TIP: The start-in-gear protection device prevents the engine from starting except when in neutral. 2. Attach the engine shut-off cord to a secure 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. Push the starter button to start the engine. ZMU06526 5. ZMU02026 3. Place the throttle grip in the “ ” (start) position.
Operation warmed up. For further information, see page 55. ● If the engine is warm and fails to start, open the throttle slightly and try to start the engine again. If the engine still fails to start, see page 89. 6. Slowly return the throttle grip to the fully closed position. the engine from starting except when in neutral. 2. Attach the engine shut-off cord to a secure 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.
Operation starter can also be damaged. If the engine will not start after 5 seconds of cranking, return the main switch to “ ” (on), wait 10 seconds, then crank the engine again. [ECM00192] TIP: ● ● When the engine is cold, it needs to be warmed up. For further information, see page 55. If the engine is warm and fails to start, open the throttle slightly and try to start the engine again. If the engine still fails to start, see page 89.
Operation EMU36980 Stop switches ● ● ● Turn the main switch to “ ”, or press the engine stop button and make sure the engine stops. Confirm that removing the clip from the engine shut-off switch stops the engine. Confirm that the engine cannot be started with the clip removed from the engine shut-off switch. 2. Move the remote control lever / gear shift lever firmly and crisply forward (for forward gear) or backward (for reverse gear) [about 35° (a detent can felt) for remote control models].
Operation 2. TIP: Tiller handle models: The gear shift lever operates only when the throttle grip is in the fully closed position. To shift from in gear (forward/reverse) to neutral 1. Close the throttle so that the engine slows to idle speed. After the engine is at idle speed in gear move the remote control lever / gear shift lever firmly and crisply into the neutral position.
Operation ZMU02083 EMU31742 Stopping boat EWM01510 WARNING ● ● Do not use the reverse function to slow down or stop the boat as it could cause you to lose control, be ejected, or impact the steering wheel or other parts of the boat. This could increase the risk of serious injury. It could also damage the shift mechanism. Do not shift into reverse while traveling at planing speeds. Loss of control, boat swamping, or damage to the boat could occur.
Operation 2. After stopping the engine, disconnect the fuel line if there is a fuel joint on the outboard motor. ZMU06533 3. the boat begins to feel unstable or is hard to steer, slow down and/or readjust the trim angle. 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 improve performance and fuel economy while reducing strain on the engine. Correct trim angle depends upon the combination of boat, engine, and propeller.
Operation gle. 1. Stop the engine. 2. Tilt the outboard motor up and remove the trim rod by pressing clip. Make test runs with the trim set to different angles to find the position that works best for your boat and operating conditions. TIP: The outboard motor trim angle can be changed approximately 4 degrees by shifting the trim rod one hole. EMU27885 1 Adjusting trim angle (Power trim and tilt) 1 EWM00753 WARNING ● ZMU06566 1. Trim rod 3. Reposition the rod in the desired hole.
Operation angles to find the position that works best for your boat and operating conditions. EMU27911 Adjusting boat trim 1. Power trim and tilt switch 1 UP When the boat is on plane, a bow-up attitude results in less drag, greater stability and efficiency. This is generally when the keel line of the boat is up about 3 to 5 degrees. With the bow up, the boat may have a greater tendency to steer to one side or the other. Compensate for this as you steer.
Operation EWM00221 WARNING Be sure all people are clear of the outboard motor when tilting up and down, Body parts can be crushed between the motor and the clamp bracket when the motor is trimmed or tilted. EWM00250 WARNING Bow Down Too much trim-in causes the boat to “plow” through the water, decreasing fuel economy and making it hard to increase speed. Operating with excessive trim-in at higher speeds also makes the boat unstable.
Operation the lock position automatically. 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. For more detailed information, see page 69. [ECM01641] N ZMU06521 2. Disconnect the fuel line from the outboard motor. ZMU06503 EMU32723 ZMU06533 3.
Operation 2. Press the power trim and tilt switch “ ” (up) until the outboard motor has tilted up completely. 3. UP Push the tilt support knob into the clamp bracket to support the engine. WARNING! After tilting the outboard motor, be sure to support it with the tilt support knob or tilt support lever. Otherwise the outboard motor could fall back down suddenly if oil in the power trim and tilt unit or in the power tilt unit loses pressure.
Operation and tilt switch “ ” (down) to retract the trim rods. NOTICE: Be sure to retract the trim rods completely during mooring. This protects the rods from marine growth and corrosion which could damage the power trim and tilt mechanism. [ECM00251] EMU30192 Procedure for tilting down (manual tilt models) 1. Place the tilt lock lever in the lock position. ZMU06545 3. Push the power trim and tilt switch “ ” (down) to lower the outboard motor to the desired position. DN UP DN ZMU02306 2. 3.
Operation EMU28061 EMU28125 Shallow water EMU28073 Cruising in shallow water (manual tilt models) Procedure 1. Place the remote control lever / gear shift lever in neutral. N EWM01781 WARNING ● ● Run the boat at the lowest possible speed when using the shallow water cruising system. The tilt lock mechanism 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.
Operation ZMU02306 ZMU06539 3. Slightly tilt the outboard motor up. The tilt support bar will lock automatically, supporting the outboard motor in a partially raised position. This outboard motor has 2 positions for shallow water cruising. 6. Slowly lower the outboard motor to the normal position. EMU32851 Power trim and tilt models The outboard motor can be tilted up partially to allow operation in shallow water.
Operation 2. Slightly tilt the outboard motor up to the desired position using the power trim and tilt switch. WARNING! Using the power trim and tilt switch on the bottom cowling while the boat is moving or engine is on could increase the risk of falling overboard and could distract the operator, increasing the risk of collision with another boat or an obstacle. [EWM01850] UP UP DN ZMU01935 UP ZMU06537 68 3.
Maintenance EMU28227 Transporting and storing outboard motor motor while removed from a boat, keep the outboard motor in the attitude shown. EWM00693 WARNING ● ● USE CARE when transporting fuel tank, whether in a boat or car. DO NOT fill fuel container to maximum capacity. Gasoline will expand considerably as it warms up and can build up pressure in the fuel container. This can cause fuel leakage and a potential fire hazard. EWM01860 WARNING Leaking fuel is a fire hazard.
Maintenance ● ● and storing it. If storing or transporting the outboard motor on its side (not upright), put it on a cushion after draining the engine oil. Do not place the outboard motor on its side before the cooling water has drained from it completely, otherwise water may enter the cylinder through the exhaust port and cause engine trouble. Store the outboard motor in a dry, wellventilated place, not in direct sunlight. 2. 3. 4. ther information, see page 72.
Maintenance with oil is recommended. Contact your Yamaha dealer for information about fogging oil and procedures for your engine. EMU28423 Cleaning and anticorrosion measures 1. ZMU06571 7. Remove the outboard motor from the test tank. 8. Drain the cooling water completely out of the motor. Clean the body thoroughly. 9. Install the top cowling. 10. Fill the fuel tank with fresh fuel and add one ounce of “Yamaha Fuel Conditioner and Stabilizer” to each gallon of fuel.
Maintenance of cooling the engine, which can cause serious overheating. Be sure the connector is tightened securely on the fitting after flushing the engine. [ECM00541] 1 TIP: ● 3 2 ● When flushing the engine with the boat in the water, tilting up the outboard motor until it is completely out of the water will achieve better results. For cooling system flushing instructions, see page 69. EMU28451 Cleaning the outboard motor After use, wash the exterior of the outboard motor with fresh water.
Maintenance have a Yamaha dealer or other qualified mechanic do the work. The procedures involve disassembling the motor and exposing dangerous parts. To reduce the risk of injury from moving, hot, or electrical parts: ● Turn off the engine and keep the key(s) and engine shut-off cord (lanyard) with you when you perform maintenance unless otherwise specified. ● The power trim and tilt switches operate even when the ignition key is off. Keep people away from the switches whenever working around the motor.
Maintenance EMU34445 Maintenance chart 1 TIP: Refer to the sections in this chapter for explanations of each owner-specific action. The maintenance cycle on these charts assume usage of 100 hours per year and regular flushing of the cooling water passages. Maintenance frequency should be adjusted when operating the engine under adverse conditions such as extended trolling. ● Disassembly or repairs may be necessary depending on the outcome of maintenance checks.
Maintenance Initial Item Fuel line(Low pressure) Fuel pump Actions Inspection Gear oil Replacement Greasing points Greasing Impeller/water pump housing Impeller/water pump housing Inspection or replacement as necessary Power trim and tilt unit Inspection Propeller/propeller nut/ cotter pin Inspection or replacement as necessary Inspection, adjustment or replacement as necessary Inspection or replacement as necessary Inspection or replacement as necessary Spark plug(s) Spark plug caps/spark plu
Maintenance Initial Item (Yamaha) Fuel tank Actions 20 hours (3 months) Every 100 hours (1 year) 300 hours (3 years) 500 hours (5 years) Inspection and cleaning as necessary EMU34451 Maintenance chart 2 Every Item Actions 1000 hours Exhaust guide/exhaust manifold Inspection or replacement as necessary Timing belt Replacement EMU28910 TIP: When using lead or high-sulfur gasoline, inspecting valve clearance may be required more frequently than every 500 hours.
Maintenance EMU28932 Greasing Yamaha marine grease (Water resistant grease) F25A, F25EA, T25A ZMU06567 77
Maintenance F25EHA, F25MHA ZMU06554 EMU28956 Cleaning and adjusting spark plug The spark plug is an important engine component and is easy to inspect. The condition of the spark plug can indicate something about the condition of the engine. For exam- 78 ple, if the center electrode porcelain is very white, this could indicate an intake air leak or carburetion problem in that cylinder. Do not attempt to diagnose any problems yourself. Instead, take the outboard motor to a Yamaha dealer.
Maintenance move and inspect the spark plug because heat and deposits will cause the spark plug to slowly break down and erode. 1. Remove the spark plug caps from the spark plugs. 2. Remove the spark plug. If electrode erosion becomes excessive, or if carbon and other deposits are excessive, you should replace the spark plug with another of the correct type. WARNING! When removing or installing a spark plug, be careful not to damage the insulator.
Maintenance parts while the engine is running. ECM00490 NOTICE This procedure must be performed while the outboard motor is in the water. A flushing attachment or test tank can be used. If the boat is not equipped with a tachometer for the outboard motor, use a diagnostic tachometer for this procedure. Results may vary depending on whether testing is conducted with the flushing attachment, in a test tank, or with the outboard motor in the water. 1.
Maintenance utes. Remove oil dipstick and wipe it clean. Insert the dipstick and remove it again. Be sure to completely insert the dipstick into the dipstick guide, otherwise the oil level measurement will be incorrect. 10. Recheck the oil level using the dipstick to be sure the level falls between the upper and lower marks. Consult your Yamaha dealer if the oil level is out of specified level. 8. 9. 1 ZMU06610 1. Drain screw 6. Add the correct amount of oil through the filler hole.
Maintenance ● Change the oil more often when operating the engine under adverse conditions such as extended trolling. EMU29113 Checking wiring and connectors ● ● Check that each connector is engaged securely. Check that each ground lead is properly secured. switch if your boat has one. Do not use your hand to hold the propeller when loosening or tightening the propeller nut. Put a wood block between the anti-cavitation plate and the propeller to prevent the propeller from turning.
Maintenance 2. using a pair of pliers. Remove the propeller nut, washer, and spacer (if equipped). WARNING! Do not use your hand to hold the propeller when loosening the propeller nut. EMU30672 [EWM01890] Be sure to use a new cotter pin and bend the ends over securely. Otherwise the propeller could come off during operation and be lost. 1 4 6 3 Installing propeller EMU29233 Spline models ECM00500 NOTICE 1. 2 2. 5 ZMU06564 1. Cotter pin 2. Propeller nut 3. Washer 4. Spacer 5. Propeller 6.
Maintenance 2 1 ZMU03273 ZMU02063 TIP: If the propeller nut does not align with the propeller shaft hole after tightening to the specified torque, tighten the nut further to align it with the hole. EMU29287 Changing gear oil EWM00800 WARNING ● ● Be sure the outboard motor is securely fastened to the transom or a stable stand. You could be severely injured if the outboard motor falls on you. Never get under the lower unit while it is tilted, even when the tilt support lever or knob is locked.
Maintenance EMU29302 Cleaning fuel tank Recommended gear oil: Hypoid gear oil SAE#90 Gear oil quantity: F25A 0.320 L (0.338 US qt, 0.282 Imp.qt) F25EA 0.320 L (0.338 US qt, 0.282 Imp.qt) F25EHA 0.320 L (0.338 US qt, 0.282 Imp.qt) F25MHA 0.320 L (0.338 US qt, 0.282 Imp.qt) T25A 0.430 L (0.455 US qt, 0.378 Imp.qt) EWM00920 WARNING Gasoline is highly flammable, and its vapors are flammable and explosive. ● If you have any question about properly doing this procedure, consult your Yamaha dealer.
Maintenance 5. suction pipe) in a suitable cleaning solvent. Allow the filter to dry. Replace the gasket with a new one. Reinstall the fuel joint assembly and tighten the screws firmly. EMU29312 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.
Maintenance gloves. ● Do not smoke or bring any other source of ignition near the battery. Refer to page 16 for detailed safety information about batteries. The procedure for checking the battery varies for different batteries. This procedure contains typical checks that apply to many batteries, but you should always refer to the battery manufacturer’s instructions. ECM01920 NOTICE A poorly maintained battery will quickly deteriorate. 1. Check the electrolyte level. 2. Check the battery’s charge.
Maintenance 2. they are left on, the electrical system can be damaged. [ECM01930] Disconnect the negative cable(s) from the negative (-) terminal. NOTICE: Always disconnect all negative (-) cables first to avoid a short circuit and damage to the electrical system. [ECM01940] 3. 4. 88 Disconnect the positive cable(s) and remove the battery from the boat. Clean, maintain, and store the battery according to the manufacturer’s instructions.
Trouble Recovery EMU29427 Troubleshooting A problem in the fuel, compression, or ignition systems can cause poor starting, loss of power, or other problems. This section describes basic checks and possible remedies, and covers all Yamaha outboard motors. Therefore some items may not apply to your model. If your outboard motor requires repair, bring it to your Yamaha dealer. If the engine trouble-alert indicator is flashing, consult your Yamaha dealer. Starter will not operate. Q.
Trouble Recovery Q. Is fuel system obstructed? A. Check for pinched or kinked fuel line or other obstructions in fuel system. Q. Is fuel contaminated or stale? A. Fill tank with clean, fresh fuel. Q. Is fuel filter clogged? A. Clean or replace filter. Q. Have ignition parts failed? A. Have serviced by a Yamaha dealer. Q. Has alert system activated? A. Find and correct cause of alert. Q. Is spark plug gap incorrect? A. Inspect and adjust as specified. Q. Is ignition wiring damaged or poorly connected? A.
Trouble Recovery Q. Is load on boat improperly distributed? A. Distribute load to place boat on an even plane. on gear housing? A. Remove foreign matter and clean lower unit. Q. Is water pump or thermostat faulty? A. Have serviced by a Yamaha dealer. Q. Is fuel system obstructed? A. Check for pinched or kinked fuel line or other obstructions in fuel system. Q. Is there excess water in fuel filter cup? A. Drain filter cup. Q. Is fuel filter clogged? A. Clean or replace filter. Engine power loss. Q.
Trouble Recovery Q. Is fuel joint connection incorrect? A. Connect correctly. Q. Is heat range of spark plug incorrect? A. Inspect spark plug and replace it with recommended type. trailering. Damage could make the outboard motor unsafe to operate. If the outboard motor hits an object in the water, follow the procedure below. Q. Is high pressure fuel pump drive belt broken? A. Have serviced by a Yamaha dealer. Q. Is engine not responding properly to shift lever position? A.
Trouble Recovery 4 2 1 3 1 ZMU02816 ZMU06565 1. Fuse puller 2. Cap 3. Fuse (20 A, 30 A) 4. Spare fuse (20 A, 30 A) 1. Manual valve screw 2. 2 Put the engine in the desired position, then tighten the manual valve screw by turning it counterclockwise. EMU29533 Starter will not operate If the starter mechanism does not operate (the engine cannot be cranked with the starter), the engine can be started with an emergency starter rope. 1 EWM01022 WARNING ● ZMU03562 1. Fuse puller 2.
Trouble Recovery ● ● ● 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. Make sure no one is standing behind you when pulling the starter rope. It could whip behind you and injure someone. An unguarded, rotating flywheel is very dangerous. Keep loose clothing and other objects away when starting the engine.
Trouble Recovery ZMU02026 ZMU06579 4. Pass the start-in-gear protection cable under the fuel line and remove the spring from it. 6. 7. Insert the knotted end of the emergency starter rope into the notch in the flywheel magnet and wind the rope 1 or 2 turn(s) around the flywheel magnet clockwise. Pull the rope slowly until resistance is felt. Give a strong pull straight out to crank and start the engine. If the engine does not start on the first try, repeat the procedure. ZMU06578 5.
Trouble Recovery EMU38851 Emergency starting engine (electric start model) 1. and that the clip is attached to the engine shut-off switch. The main switch must be “ ” (on), if equipped. Remove the top cowling and protective cover. ZMU06585 N 2. Pull off the 10-pin connector from the clamp and remove the flywheel magnet cover (if equipped). ZMU06521 ZMU06581 3. Remove the flywheel magnet cover after removing the bolt(s). ZMU06582 4.
Trouble Recovery 6. starter rope into the notch in the flywheel magnet and wind the rope 1 or 2 turn(s) around the flywheel magnet clockwise. Pull the rope slowly until resistance is felt. Give a strong pull straight out to crank and start the engine. If the engine does not start on the first try, repeat the procedure. ZMU06584 ZMU02026 TIP: ● ● If the engine does not start on the first try, repeat the procedure.
Consumer information EMU29830 YAMAHA MOTOR CORPORATION, U.S.A.
Consumer information 99
Consumer information EMU29841 IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE THE USA OR CANADA 100
6BP-9-11 Hyoshi 背巾4mm 09.2.19 9:09 ページ 2 EMU25062 ZMU01690 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.
6BP-9-11 Hyoshi 背巾4mm 09.2.19 9:09 ページ 1 F25 T25 OWNER’S MANUAL Printed in Japan February 2009–0.8 × 1 ! Printed on recycled paper q Read this manual carefully before operating this outboard motor. U.S.A.
