Yamaha F25 manual

Printed in Japan February 2009–0.8 × 1 ! Printed on recycled paper F25 T25 O WNER’S MANU AL 6BP-28199-11 U .S.A.Edition LIT -18626-08-49 q Read this manual carefully bef ore operating this outboard motor . 6BP-9-11 Hyoshi 背巾4mm 09.2.19 9:09 ページ 1[...]

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 2[...]

Important manual information EMU31283 To the owner Thank you for choosing a Yamaha outboard motor. This Owner’s Manual contains infor- mation needed for proper operation, mainte- nance and care. A thorough understanding of these simple instructions will help you ob- tain maximum enjoyment from your new Yamaha. If you have any question about the o[...]

Table of contents Safety information ............................. 1 Outboard motor safety .................... 1 Propeller ............................................ 1 Rotating parts .................................... 1 Hot parts ........................................... 1 Electric shock .................................... 1 Power trim and [...]

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) [...]

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 [...]

1 Safety information EMU33622 Outboard motor safety Observe these precautions at all times. EMU36501 Propeller People can be injured or killed if they come in contact with the propeller. The propeller can keep moving even when the motor is in neutral, and sharp edges of the propeller can cut even when stationary. ● Stop the engine when a person i[...]

Safety information 2 EMU33820 Gasoline exposure and spills Take care not to spill gasoline. If gasoline spills, wipe it up immediately with dry rags. Dispose of rags properly. If any gasoline spills onto your skin, immedi- ately wash with soap and water. Change clothing if gasoline spills on it. If you swallow gasoline, inhale a lot of gaso- line v[...]

Safety information 3 dling and lead to an accident, capsizing or swamping. EMU33772 Avoid collisions Scan constantly for people, objects, and oth- er boats. Be alert for conditions that limit your visibility or block your vision of others. Operate defensively at safe speeds and keep a safe distance away from people, ob- jects, and other boats. ● [...]

Safety information 4 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 regul[...]

Safety information 5 EMU33700 Steering and sailing rules and sound signals Whenever two vessels on the water meet one another, one vessel has the right-of- way; it is called the “ stand-on ” vessel. The vessel that does not have the right-of-way is called the “ give-way ” or “ burdened ” vessel. These rules determine which vessel has th[...]

Safety information 6 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 oth- er on the starboard (right) side must keep out of the way of the other. If the other vessel is on your right, you must keep out of its way; you are the Give-Way vessel. If the other [...]

Safety information 7 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 navigat- ing in a particular direction. The markings[...]

Safety information 8 ZMU01708[...]

9 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 [...]

General information 10 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 missi[...]

General information 11 F25EHA, F25MHA ZMU06475 1 2 3[...]

General information 12 12 3 ZMU05670[...]

General information 13 EMU33843 Symbols The following symbols mean as follows. Notice/Warning Read Owner ’ s Manual Hazard caused by continuous rotation Electrical hazard Remote control lever/gear shift lever operat- ing direction, dual direction Engine start/ Engine cranking ZMU05696 ZMU05664 ZMU05665 ZMU05666 ZMU05667 ZMU05668[...]

14 Specifications and requirements EMU34520 Specifications T IP: “ (AL) ” stated in the specification data below represents the numerical value for the alumi- num propeller installed. Likewise, “ (SUS) ” represents the value for stainless steel propeller installed and “ (PL) ” for plastic propeller installed. T IP: “ * ” means, sele[...]

Specifications and requirements 15 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 [...]

Specifications and requirements 16 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 W ARNING EWM01560 Overpowering a boat can cause severe instability. Before installing the outboard motor(s), con- firm that the total horsepower of your mo- tor(s)[...]

Specifications and requirements 17 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. [EWM01820] EMU36300 Multiple batte[...]

Specifications and requirements 18 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. Always select neutral before starting the engine. EMU31444 Engine oil requirements If th[...]

Specifications and requirements 19 has been stored in clean containers. Gasohol There are two types of gasohol: gasohol con- taining 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 yo[...]

Specifications and requirements 20 EMU36341 Motor disposal requirements 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, pli- ers, wrenches (in[...]

Specifications and requirements 21 EMU25273 Star labels Your outboard motor is labeled with a Cali- fornia Air Resources Board (CARB) star la- bel. See below for a description of your particular label. EMU25280 One Star — Low Emission The one-star label identifies engines that meet the Air Resources Board ’ s 2001 ex- haust emission standards. [...]

Specifications and requirements 22 these standards have 65% lower emissions than One Star-Low-Emission engines. 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 [...]

23 Components EMU2579M Components diagram T IP: * May not be exactly as shown; also may not be included as standard equipment on all mod- els. F25A, F25EA, T25A 1 2 10 3 5 6 7 8 12 13 11 4 9 11 13 15 14 16 17 ZMU06605 1. T op cowling 2. Cowling lock le ver 3. Idle hole 4. Drain screw 5. Anti-cavitation plate 6. T rim tab 7. Propeller 8. Cooling wat[...]

Components 24 F25EHA, F25MHA EMU25802 Fuel tank If your model was equipped with a portable fuel tank, its function is as follows. W ARNING EWM00020 The fuel tank supplied with this engine is its dedicated fuel reservoir and must not be used as a fuel storage container. Com- mercial users should conform to relevant licensing or approval authority re[...]

Components 25 EMU25830 Fuel joint This joint is used to connect the fuel line. EMU25841 Fuel gauge This gauge is located on either the fuel tank cap or on the fuel joint base. It shows the ap- proximate amount of fuel remaining in the tank. EMU25850 Fuel tank cap This cap seals the fuel tank. When removed, the tank can be filled with fuel. To remov[...]

Components 26 EMU26201 Neutral interlock trigger To shift out of neutral, first pull the neutral in- terlock trigger up. EMU26211 Neutral throttle lever To open the throttle without shifting into ei- ther forward or reverse, put the remote con- trol lever in the neutral position and lift the neutral throttle lever. T IP: The neutral throttle lever [...]

Components 27 moves ahead. Pushing the lever away from you puts the engine in reverse gear so that the boat moves astern. EMU25941 Throttle grip The throttle grip is on the tiller handle. Turn the grip counterclockwise to increase speed and clockwise to decrease speed. EMU25961 Throttle indicator The fuel consumption curve on the throttle indicator[...]

Components 28 EMU25975 Throttle friction adjuster A friction device provides adjustable resis- tance to movement of the throttle grip or the remote control lever, and can be set accord- ing to operator preference. To increase resistance, turn the adjuster clockwise. To decrease resistance, turn the adjuster counterclockwise. WARNING! Do not overtig[...]

Components 29 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] EMU26001 Engine stop button To open the ignition circuit and stop the en- gine, push this button. EMU26070 Manual [...]

Components 30 dle out until resistance is felt. From that posi- tion, then pull the handle straight out quickly to crank the engine. EMU26080 Starter button To start the engine with the electric starter, push the starter button. EMU26090 Main switch The main switch controls the ignition system; its operation is described below. ● “” (off) Wit[...]

Components 31 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. T IP: ● Steering movement is blocked when the adjuster lever is set to the “ A ” position. ● Check the tiller handle for smooth move- ment when the lever is turned to the s[...]

Components 32 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. W ARNING EWM01030 Use the power trim and tilt switch located on the bottom engine cowling only when the boat is at a complete stop with the en- gine off. Atte[...]

Components 33 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 (star- board side), turn the trim tab end to the star- board side “ B ” in t[...]

Components 34 port and fall. If the motor cannot be trail- ered 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. NOTICE ECM01660 Do not use the tilt support bar when trailering the boat. The outboard [...]

Components 35 1. Aler t indicator 1 ZMU06506[...]

36 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. NOTICE ECM00022 ● Do not continue to run the engine if the low oil pressure-alert indicator is on and the engine oil level is lower. Seri- ous engine damage [...]

37 Engine control system EMU26803 Alert system NOTICE ECM00091 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 38 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. ZMU02360[...]

39 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. Prop- er mounting depends in part on experience and the specific boat and motor combination. W ARNING EWM01590 ● Overpowering a boat could[...]

Installation 40 NOTICE ECM01631 ● 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 ac- cessories such as transom ladders or depth finder tra[...]

Installation 41 3. Secure the clamp bracket to the transom using the bolts provided with the out- board (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 tightene[...]

42 Operation EMU36381 First-time operation EMU36391 Fill engine oil The engine is shipped from the factory with- out 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 shippe[...]

Operation 43 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 remov[...]

Operation 44 make sure there is no hesitation in their travel. Operation should be smooth over the complete range of motion, and each le- ver should return completely to the idle po- sition. ● Look for loose or damaged connections of the throttle and shift cables. EMU36481 Engine shut-off cord (lanyard) Inspect the engine shut-off cord for damage[...]

Operation 45 EMU27166 Engine oil 1. Put the outboard motor in an upright po- sition (not tilted). NOTICE: If the motor is not level, the oil level indicated on the dipstick may not be accurate. [ECM01790] 2. Remove oil dipstick and wipe it clean. 3. Insert the dipstick and remove it again. Be sure to completely insert the dipstick into the dipstick[...]

Operation 46 installed correctly, water spray under the cowling can damage the engine, or the cowling can blow off at high speeds. [ECM01990] 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. EMU38910 Checking power trim and tilt system W ARNING[...]

Operation 47 mable and explosive. Always refuel ac- cording 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[...]

Operation 48 water near you. ● When the air vent screw is loosened, gasoline vapor will be released. Gaso- line is highly flammable, and its vapors are flammable and explosive. Refrain from smoking, and keep away from open flames and sparks while loosen- ing the air vent screw. ● This product emits exhaust gases which contain carbon monoxide, a[...]

Operation 49 EMU27493 Starting engine W ARNING EWM01600 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 wa- ter near you. EMU39011 Starting engine W ARNING EWM01840 ● Failure to attached engine shut-off cord could result in a runaway boat [...]

Operation 50 5. After the engine starts, slowly return the manual starter handle to its original po- sition before releasing it. T IP: 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 leve[...]

Operation 51 5. Pull the manual starter handle slowly un- til you feel resistance. Then give a strong pull straight out to crank and start the engine. Repeat if necessary. 6. After the engine starts, slowly return the manual starter handle to its original po- sition before releasing it. 7. Loosen the throttle friction adjuster and return the thrott[...]

Operation 52 3. Place the throttle grip in the “” (start) position. After the engine starts, return the throttle to the fully closed po- sition. 4. Turn the main switch to “” (start), and hold it for a maximum of 5 seconds. 5. Immediately after the engine starts, re- lease the main switch and allow it to re- turn to “” (on). NOTICE: Nev[...]

Operation 53 T IP: The start-in-gear protection device prevents the engine from starting except when in neu- tral. 2. 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. 3. Place the throttle grip in the “” (start) position.[...]

Operation 54 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. EMU27664 Electric start and remote control models W ARNING EWM0184[...]

Operation 55 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] T IP: ● 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 [...]

Operation 56 EMU36980 Stop switches ● Turn the main switch to “” , or press the engine stop button and make sure the en- gine stops. ● Confirm that removing the clip from the en- gine shut-off switch stops the engine. ● Confirm that the engine cannot be started with the clip removed from the engine shut-off switch. EMU34561 Shifting W ARN[...]

Operation 57 T IP: 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 1. Close the throttle so that the engine slows to idle speed. 2. After the engine is at idle speed in gear move the remote control lever / gear shift lever firmly [...]

Operation 58 EMU31742 Stopping boat W ARNING EWM01510 ● Do not use the reverse function to slow down or stop the boat as it could cause you to lose control, be ejected, or im- pact 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 [...]

Operation 59 2. After stopping the engine, disconnect the fuel line if there is a fuel joint on the outboard motor. 3. Tighten the air vent screw on the fuel tank cap (if equipped). 4. Remove the key if the boat will be left unattended. T IP: The engine can also be stopped by pulling the cord and removing the clip from the en- gine shut-off switch,[...]

Operation 60 gle. 1. Stop the engine. 2. Tilt the outboard motor up and remove the trim rod by pressing clip. 3. Reposition the rod in the desired hole. To raise the bow ( “ trim-out ” ), move the rod away from the transom. To lower the bow ( “ trim-in ” ), move the rod to- ward the transom. Make test runs with the trim set to different ang[...]

Operation 61 To raise the bow (trim-out), press the switch “” (up). To lower the bow (trim-in), press the switch “” (down). Make test runs with the trim set to different angles to find the position that works best for your boat and operating conditions. EMU27911 Adjusting boat trim When the boat is on plane, a bow-up attitude results in les[...]

Operation 62 Bow Down Too much trim-in causes the boat to “ plow ” through the water, decreasing fuel economy and making it hard to increase speed. Oper- ating with excessive trim-in at higher speeds also makes the boat unstable. Resistance at the bow is greatly increased, heightening the danger of “ bow steering ” and making opera- tion di[...]

Operation 63 2. Disconnect the fuel line from the out- board motor. 3. Place the tilt lock lever (if equipped) in the release/up position. 4. Pull up the shallow water lever (if equipped). 5. Hold the rear of the top cowling with one hand and tilt the engine up fully. 6. Push the tilt support knob into the clamp bracket. Or the tilt support bar wil[...]

Operation 64 2. Press the power trim and tilt switch “” (up) until the outboard motor has tilted up completely. 3. 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 bac[...]

Operation 65 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[...]

Operation 66 EMU28061 Shallow water EMU28073 Cruising in shallow water (manual tilt models) W ARNING EWM01781 ● Run the boat at the lowest possible 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 outboa[...]

Operation 67 3. Slightly tilt the outboard motor up. The tilt support bar will lock automatically, supporting the outboard motor in a par- tially raised position. This outboard mo- tor has 2 positions for shallow water cruising. 4. To return the outboard motor to the nor- mal running position, place the remote control lever / gear shift lever in ne[...]

Operation 68 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 bot- tom 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 b[...]

69 Maintenance EMU28227 Transporting and storing outboard motor W ARNING EWM00693 ● USE CARE when transporting fuel tank, whether in a boat or car. ● DO NOT fill fuel container to maximum capacity. Gasoline will expand consid- erably as it warms up and can build up pressure in the fuel container. This can cause fuel leakage and a potential fire[...]

Maintenance 70 and storing it. If storing or transporting the outboard motor on its side (not up- right), 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 trou- b[...]

Maintenance 71 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. T IP: The use of “ Yamaha Fuel Conditioner[...]

Maintenance 72 2. Screw the garden hose adapter onto a garden hose, which is connected to a fresh water supply, and then connect it to the garden hose connector. 3. With the engine off, turn on the water tap and let the water flush through the cool- ing passages for about 15 minutes. Turn off the water and disconnect the garden hose adapter from th[...]

Maintenance 73 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 othe[...]

Maintenance 74 EMU34445 Maintenance chart 1 T IP: ● 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 [...]

Maintenance 75 Fuel line(Low pres- sure) Inspection or replace- ment as necessary Fuel pump Inspection or replace- ment as necessary Fuel/engine oil leakage Inspection Gear oil Replacement Greasing points Greasing Impeller/water pump housing Inspection or replace- ment as necessary Impeller/water pump housing Replacement P ow er trim and tilt unit [...]

Maintenance 76 EMU34451 Maintenance chart 2 EMU28910 T IP: When using lead or high-sulfur gasoline, inspecting valve clearance may be required more frequently than every 500 hours. (Y amaha) Fuel tank Inspection and clean- ing as necessary Item Actions Every 1000 hours Exhaust guide/exhaust manifold Inspection or replace- ment as necessary Timing b[...]

Maintenance 77 EMU28932 Greasing Yamaha marine grease (Water resistant grease) F25A, F25EA, T25A ZMU06567[...]

Maintenance 78 F25EHA, F25MHA EMU28956 Cleaning and adjusting spark plug The spark plug is an important engine com- ponent and is easy to inspect. The condition of the spark plug can indicate something about the condition of the engine. For exam- ple, if the center electrode porcelain is very white, this could indicate an intake air leak or carbure[...]

Maintenance 79 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 ero- sion becomes excessive, or if carbon and other deposits are excessive, you should replace the spark plug with an- other of [...]

Maintenance 80 parts while the engine is running. NOTICE ECM00490 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 ta- chometer for this procedure. Results may vary depending on whether tes[...]

Maintenance 81 6. Add the correct amount of oil through the filler hole. Put back the filler cap and the dipstick. NOTICE: Overfilling the oil could cause leakage or damage. If the oil level is above the upper level mark, drain until the level meets the specified capacity. [ECM01850] 7. Leave the outboard motor for 5-10 min- utes. 8. Remove oil dip[...]

Maintenance 82 ● 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 se- curely. ● Check that each ground lead is properly secured. EMU32112 Checking propeller W ARNING EWM01881 You could be seriously injured if t[...]

Maintenance 83 using a pair of pliers. 2. Remove the propeller nut, washer, and spacer (if equipped). WARNING! Do not use your hand to hold the propel- ler when loosening the propeller nut. [EWM01890] 3. Remove the propeller, washer (if equipped), and thrust washer. EMU30672 Installing propeller EMU29233 Spline models NOTICE ECM00500 Be sure to use[...]

Maintenance 84 T IP: 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 W ARNING EWM00800 ● Be sure the outboard motor is securely fastened to the transom or a stable stand. You could be severely injured if the ou[...]

Maintenance 85 6. Put a new gasket on the oil level plug. When the oil begins to flow out of the oil level plug hole, insert and tighten the oil level plug. 7. Put a new gasket on the gear oil drain screw. Insert and tighten the gear oil drain screw. EMU29302 Cleaning fuel tank W ARNING EWM00920 Gasoline is highly flammable, and its va- pors are fl[...]

Maintenance 86 suction pipe) in a suitable cleaning sol- vent. Allow the filter to dry. 5. Replace the gasket with a new one. Re- install 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 periodicall[...]

Maintenance 87 gloves. ● Do not smoke or bring any other source of ignition near the battery. Refer to page 16 for detailed safety infor- mation about batteries. The procedure for checking the battery var- ies for different batteries. This procedure contains typical checks that apply to many batteries, but you should always refer to the battery m[...]

Maintenance 88 they are left on, the electrical system can be damaged. [ECM01930] 2. Disconnect the negative cable(s) from the negative (-) terminal. NOTICE: Al- ways disconnect all negative (-) ca- bles first to avoid a short circuit and damage to the electrical system. [ECM01940] 3. Disconnect the positive cable(s) and re- move the battery from t[...]

89 Trouble Recovery EMU29427 Troubleshooting A problem in the fuel, compression, or igni- tion systems can cause poor starting, loss of power, or other problems. This section de- scribes 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[...]

Trouble Recovery 90 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 activat[...]

Trouble Recovery 91 Q. Is load on boat improperly distributed? A. Distribute load to place boat on an even plane. Q. Is water pump or thermostat faulty? A. Have serviced by a Yamaha dealer. Q. Is there excess water in fuel filter cup? A. Drain filter cup. Engine power loss. Q. Is propeller damaged? A. Have propeller repaired or replaced. Q. Is prop[...]

Trouble Recovery 92 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 rec- ommended type. Q. Is high pressure fuel pump drive belt bro- ken? A. Have serviced by a Yamaha dealer. Q. Is engine not responding properly to shift lever position? A. Have service[...]

Trouble Recovery 93 EMU29512 Power trim and tilt will not operate If the engine cannot be tilted up or down with the power trim and tilt because of a dis- charged battery or a failure with the power trim and tilt unit , the engine can be tilted manually. 1. Loosen the manual valve screw by turn- ing it clockwise until it stops. 2. Put the engine in[...]

Trouble Recovery 94 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.[...]

Trouble Recovery 95 4. Pass the start-in-gear protection cable under the fuel line and remove the spring from it. 5. Be sure that the gear shift is in neutral and that the clip is attached to the en- gine shut-off switch. 6. 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) a[...]

Trouble Recovery 96 EMU38851 Emergency starting engine (electric start model) 1. Remove the top cowling and protective cover. 2. Pull off the 10-pin connector from the clamp and remove the flywheel magnet cover (if equipped). 3. Remove the flywheel magnet cover after removing the bolt(s). 4. Be sure that the gear shift is in neutral and that the cl[...]

Trouble Recovery 97 5. 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. 6. 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, repea[...]

98 Consumer information EMU29830 YAMAHA MOTOR CORPORATION, U.S.A. FOUR-STROKE OUTBOARD MOTOR THREE-YEAR LIMITED WARRANTY[...]

Consumer information 99[...]

Consumer information 100 EMU29841 IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE THE USA OR CANADA[...]

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 2[...]

Printed in Japan February 2009–0.8 × 1 ! Printed on recycled paper F25 T25 O WNER’S MANU AL 6BP-28199-11 U .S.A.Edition LIT -18626-08-49 q Read this manual carefully bef ore operating this outboard motor . 6BP-9-11 Hyoshi 背巾4mm 09.2.19 9:09 ページ 1[...]