EMU31280 your machine and this manual. If there is any To the owner question concerning this manual, please con- Thank you for choosing a Yamaha outboard sult your Yamaha dealer. motor. This Owner’s Manual contains infor- NOTE: mation needed for proper operation, mainte- The F250TR, LF250TR and the standard ac- nance and care.
Table of contents Flushing device ........ 19 General information ......1 Water separator........ 19 Identification numbers record ..1 Digital tachometer ......20 Outboard motor serial number ... 1 Low oil pressure warning indicator ... 20 Key number ........1 Overheat warning indicator Emission control information ...
Page 5
Battery care ........49 Important warranty information for Flushing power unit ......50 U.S.A. and Canada ....76 Cleaning the outboard motor.... 51 YAMAHA MOTOR Checking painted surface of motor... 51 CORPORATION, U.S.A. Periodic maintenance....51 FOUR-STROKE OUTBOARD Replacement parts ......52 MOTOR THREE-YEAR Maintenance chart......
Page 6
Table of contents IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE THE USA OR CANADA ..... 80...
Record your outboard motor serial number in the spaces provided to assist you in ordering spare parts from your Yamaha dealer or for reference in case your outboard motor is sto- 1. Key number len.
General information 1. Star labels location EMU25262 Manufactured date label EMU25280 This label is attached to the clamp bracket or One Star—Low Emission The one-star label identifies engines that the swivel bracket. meet the Air Resources Board’s 2001 ex- haust emission standards. Engines meeting these standards have 75% lower emissions than conventional carbureted two-stroke en- gines.
General information the rated horsepower capacity of the boat. If the rated horsepower capacity of the boat is unknown, consult the dealer or boat man- ufacturer. Do not modify the outboard. Modifications could make the motor unfit or unsafe to use. Incorrect propeller selection and incorrect use may not only cause engine damage, but also adversely affect fuel consumption.
Never illegally discard (dump) the product. Keep hands, hair, and clothes away from Yamaha recommends consulting the deal- flywheel and other rotating parts while er on discarding the product. engine is running.
General information EMU25413 the “give-way” or “burdened” vessel. These Label (counter rotation models) rules determine which vessel has the right-of- EWM01281 way, and what each vessel should do. WARNING Stand-on vessel Use only a counterclockwise rotation pro- The vessel with the right-of-way has the duty peller with this engine.
General information Crossing: (you are traveling across the other Crossing When two power driven vessels are crossing vessel’s path) each other’s path close enough to run the risk Overtaking: (you are passing or being of collision, the vessel which has the other on passed by another vessel) the starboard (right) side must keep out of the In the following illustration, your boat is in the...
Page 13
General information vessels, the operator should sound a pro- proceeding from open water into port, and longed blast on the whistle (4 to 6 seconds). If black buoys are to port (left) side. When navi- another vessel is around the bend, it too gating out of port, your position with respect to should sound the whistle.
General information ZMU01708 EMU25540 Do not smoke when refueling, and keep Fueling instructions away from sparks, flames, or other EWM00010 sources of ignition. WARNING Stop engine before refueling. GASOLINE AND ITS VAPORS ARE HIGH- Refuel in a well-ventilated area. Refuel LY FLAMMABLE AND EXPLOSIVE! portable fuel tanks off the boat.
Gasohol containing ethanol can be used if ECM01050 ethanol content does not exceed 10% and the CAUTION: fuel meets minimum octane ratings. Yamaha All 4-stroke engines are shipped from the does not recommended gasohol containing factory without engine oil. methanol because it can cause fuel system...
Yamaha outboard motors are fitted with pro- pellers chosen to perform well over a range of applications, but there may be uses where a propeller with a different pitch would be more appropriate.
For instructions on propeller removal and in- stallation, see page 61. EMU25770 Start-in-gear protection Yamaha outboard motors or Yamaha-ap- proved remote control units are equipped with start-in-gear protection device(s). This feature permits the engine to be started only when it is in neutral.
Basic components EMU25799 Main components NOTE: * May not be exactly as shown; also may not be included as standard equipment on all models. 1. Top cowling 17.Digital tachometer* 2. Anti-cavitation plate 18.Fuel management meter* 3. Trim tab (anode) 4. Propeller* 5.
Basic components ZMU05429 1. Tachometer unit (Square type)* 2. Tachometer unit (Round type)* 3. Speedometer unit (Square type)* 4. Speed & fuel meter unit (Square type)* 5. Speed & fuel meter unit (Round type)* 6. Fuel management meter (Square type)* EMU26180 Remote control The remote control lever actuates both the...
Basic components EMU26232 Free accelerator To open the throttle without shifting into either forward or reverse, push the free accelerator button and move the remote control lever. ZMU04569 1. Remote control lever 2. Power trim and tilt switch 3. Free accelerator 4.
Basic components matically to its set position. The remote con- When constant speed is desired, tighten the trol will then engage forward and reverse adjuster to maintain the desired throttle set- normally. ting. EMU25990 Engine stop lanyard switch EMU25971 Throttle friction adjuster The lock plate must be attached to the engine A friction device provides adjustable resis- stop switch for the engine to run.
Basic components START ZMU04567 ZMU04565 1. Lanyard 2. Lock plate START START START START ZMU04566 EMU26141 ZMU04564 Power trim and tilt switch on remote 1. Lanyard control or tiller handle 2. Lock plate The power trim and tilt system adjusts the out- board motor angle in relation to the transom.
Basic components NOTE: For instructions on using the power trim and tilt switch, see page 43. EMU26161 Power trim and tilt switches (twin bin- nacle type) The power trim and tilt system adjusts the out- board motor angle in relation to the transom. Pushing the switch “...
Basic components EWM00840 3. Cap WARNING An improperly adjusted trim tab could cause difficult steering. Always test run af- ter the trim tab has been installed or re- placed to be sure steering is correct. Be sure you have tightened the bolt after ad- justing the trim tab.
Basic components EMU31420 Top cowling lock lever (pull up type) NOTE: For details on usage, see page 50. To remove the top cowling, pull up the lock le- ver(s) and lift off the cowling. To install the top cowling, place it in its original position, and then move the lever(s) downward to lock it in place.
Serious If the warning system has activated, stop engine damage will occur. the engine and consult a Yamaha dealer The low oil pressure warning indicator immediately. does not indicate the engine oil level.
Basic components NOTE: The speedometer displays km/h, mph, or knots, according to operator preference. Se- lect the desired unit of measurement by set- ting the selector switch on the back of the gauge. See the illustration for settings. ZMU01737 1. Overheat warning indicator EMU26600 Speedometer (digital type) This gauge shows the boat speed.
Basic components EMU26690 Trip meter This gauge displays the distance the boat has traveled since the gauge was last reset. Press the “ ” (mode) button repeatedly until the indicator on the face of the gauge points to “ ” (trip). To reset the trip meter to zero, press the “...
Get back to the port within trolling en- is full. gine speed. ECM00860 CAUTION: The Yamaha fuel tank sensor differs from conventional sensors. Incorrectly setting the selector switch on the gauge will give false readings. Consult your Yamaha deal- er on how to correctly set the selector switch.
Basic components EMU26750 Fuel flow meter The fuel flow meter displays the amount of fuel flow over a one hour period, at the current rate of engine operation. If twin engines are installed on your boat, the fuel flow meter displays the total fuel flow of both the port and starboard engines.
(winter or summer fuel and amount of addi- tives). The Yamaha digital speedometer and fuel management meter calculates speed, miles traveled, and fuel economy by water movement at the stern of the boat. This dis-...
Basic components even of the same basic dimensions of the NOTE: same design, can also cause a slight varia- If the two engines’ speeds are not synchro- tion in fuel consumption. nized while cruising, they can be synchro- nized by adjusting trim angle or throttle. EMU26780 Twin-engine speed synchronizer EMU26791...
If optional sensors are connected to the unit, cooling water pressure display will be available. For the optional sensor, consult your Yamaha dealer. The tachometer unit is ZMU05417 available in round or square types. Check 1. Set button your tachometer unit type.
Page 34
If the buzzer sounds and the water Do not continue to run the engine if the separator warning indicator blinks, consult low oil pressure warning device has acti- your Yamaha dealer immediately. vated. Serious engine damage will occur. NOTE: Overheat warning To stop the buzzer, press the “...
Page 35
This indicator will blink when the engine mal- a warning device has activated. Consult functions while cruising. Get back to the port your Yamaha dealer if the problem can- soon and consult a Yamaha dealer immedi- not be located and corrected.
For the op- tional sensor, consult your Yamaha dealer. The speed & fuel meter unit is available in ZMU05434 round or square types. Check your speed &...
NOTE: The speedometer unit shows various kinds of able. For the optional sensor, consult your information according to the setting made us- Yamaha dealer. ing the “ ” (set) and “ ” (mode) buttons. In addition, the speedometer can show the desired unit of measurement such as km/h, mph, or knots.
Do not continue to operate the engine if a warning device has activated. Consult your Yamaha dealer if the problem cannot be located and corrected. EMU26824 Overheat warning (twin engines) This engine has an overheat warning device.
If the oil Low oil pressure warning level is correct and the warning device does If the oil pressure drops too low, the warning not switch off, consult your Yamaha dealer. device will activate. ECM00100 Activation of warning device...
Operation EMU26901 EWM01520 Installation WARNING ECM00110 Improper mounting of the outboard motor CAUTION: could result in hazardous conditions such Incorrect engine height or obstructions to as poor handling, loss of control, or fire smooth water flow (such as the design or hazards.
If any item in the preoperation check is not optimum mounting height. Consult your working properly, have it inspected and Yamaha dealer or boat manufacturer for repaired before operating the outboard further information on determining the prop- motor. Otherwise an accident could occur.
Place the gear shift lever in neutral and turn the main switch to “ ”(on). If the buzzer sounds and the water separator warning indicator blinks, consult your Yamaha dealer imme- diately. EMU31710 Controls Check throttle, shift, and steering for proper operation before starting the engine.
Performance drops and engine wear increases dramatical- While many additives available may reduce deposits, Yamaha recommends the use of Ring Free Fuel Additive, available from your Yamaha dealer. Ring Free Fuel Additive has repeatedly proven its ability to clean com- bustion deposits from inside the engine, nota- 1.
Page 44
Operation Attach the engine stop switch lanyard to Turn the main switch to “ ” (on). a secure place on your clothing, or your NOTE: arm or leg. Then install the lock plate on Dual engine users: When the main switch is the other end of the lanyard into the en- turned on, the buzzer operates for a few sec- gine stop switch.
Check the oil level and speed may be higher than normal. High add oil if necessary. Consult your idle speed can prevent you from shifting Yamaha dealer if the cause for the low oil pressure warning indicator cannot be found.
Operation back to neutral. If this occurs, stop the en- gine, shift to neutral, then restart the en- gine and allow it to warm up. To shift out of neutral Pull the neutral interlock trigger up (if equipped). Move the remote control lever firmly and crisply forward (for forward gear) or back- ward (for reverse gear) about 35°...
Operation EWM00740 WARNING START Excessive trim for the operating condi- tions (either trim up or trim down) can cause boat instability and can make steer- ing the boat more difficult. This increases the possibility of an accident. If the boat begins to feel unstable or is hard to steer, slow down and/or readjust the trim angle.
Operation Adjust the outboard motor trim angle using Make test runs with the trim set to different an- the power trim and tilt switch. gles 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 less drag, greater stability and effi- ciency.
Operation EWM01540 WARNING Be sure all people are clear of the out- board motor when tilting up and down, also be careful not to pinch any body parts between the drive unit and engine bracket. ECM00991 CAUTION: Before tilting the outboard motor, follow the procedure under “Stopping engine”...
Page 50
Operation ZMU04194 ZMU04602 EWM00260 WARNING After tilting the outboard motor, be sure to support it with the tilt support knob or tilt support lever. Otherwise the outboard mo- tor could fall back down suddenly if oil in the power trim and tilt unit loses pressure. Models equipped with trim rods: Once the outboard motor is supported with the tilt support lever, press the power trim and...
Operation ZMU04196 ZMU01884 EMU28055 Procedure for tilting down (power trim and tilt models / power tilt models) Push the power trim and tilt switch / pow- er tilt switch “ ” (up) until the outboard motor is supported by the tilt rod and the tilt support lever / tilt support knob be- comes free.
Place the remote control lever / gear shift page 48. lever in neutral. Cruising in turbid water Yamaha strongly recommends that you use the optional chromium-plated water pump kit (not available for some models) if you use the outboard motor in turbid or muddy water con- ditions.
Maintenance EMU31480 Spark plug gap: Specifications 1.0–1.1 mm (0.039–0.043 in) Control system: NOTE: Remote control “(AL)” stated in the specification data below Starting system: represents the numerical value for the alumi- Electric Starting carburetion system: num propeller installed. Electronic fuel injection Likewise, “(SUS)”...
Spark plug: is advisable to have your outboard motor ser- 25.0 Nm (18.4 ft-lb) (2.55 kgf-m) viced by an authorized Yamaha dealer prior to Propeller nut: storage. However, you, the owner, with a min- 55.0 Nm (40.6 ft-lb) (5.61 kgf-m)
For information on spark Fill the fuel tank with fresh fuel and add one plug installation, see page 54. ounce of “Yamaha Fuel Conditioner and Sta- Change the gear oil. For instructions, see bilizer” (Part No. LUB-FUELC-12-00) to each page 63.
Maintenance Avoid bodily contact with electrolytic Store the battery on a level surface in a fluid as it can cause severe burns or per- cool, dry, well-ventilated place out of di- manent eye injury. rect sunlight. Wear protective eye gear when handling Once a month, check the specific gravity or working near batteries.
If you or the owner is not famil- it is completely out of the water will achieve iar with machine servicing, this work better results. should be done by your Yamaha dealer or For cooling system flushing instructions, other qualified mechanic. see page 48.
When operating in salt water, turbid or muddy water, the engine should be flushed with clean water after each use. The “ ” symbol indicates the check-ups which you may carry out yourself. The “ ” symbol indicates work to be carried out by your Yamaha dealer. Initial Every Item Actions...
Maintenance EMU28931 Greasing Yamaha marine grease (Water resistant grease) be careful not to damage the insulator. A EMU30771 Cleaning and adjusting spark plug damaged insulator could allow external EWM00560 sparks, which could lead to explosion or WARNING fire. When removing or installing a spark plug,...
Page 61
Instead, take necessary. the outboard motor to a Yamaha dealer. You should periodically remove and inspect the spark plug because heat and deposits will cause the spark plug to slowly break down and erode.
Improper repairs can make the fastened to the transom or a stable outboard unsafe to operate. stand. Check the fuel lines for leaks, crack, or mal- function. If a problem is found, your Yamaha dealer or other qualified mechanic should re- pair it immediately.
Page 63
Maintenance ECM01240 Remove the oil filler cap. Add the correct CAUTION: amount of oil through the filler hole, and Change the engine oil after the first 10 install the filler cap. hours of operation, and every 100 hours or at 6-month intervals thereafter. Otherwise the engine will wear quickly.
Page 64
Also, make sure that there are NOTE: no oil leaks. For more information on the disposal of ECM01620 used oil, consult your Yamaha dealer. CAUTION: Change the oil more often when operating If the low oil pressure warning indicator the engine under adverse conditions such comes on or if there are oil leaks, stop the as extended trolling.
Check for oil leaks on the around the engine. before tightening them. NOTE: Add the engine oil and check the oil level. If any leaks are found, consult your Yamaha Refer to steps 3 to 9 in the previous oil dealer. changing procedure with the oil changer.
Use the tilt support lever to lock the motor in the up position. Operate the tilt down NOTE: switch briefly so the motor is supported Consult your Yamaha dealer if any operation by the tilt support lever. is abnormal.
Maintenance EMU29171 Checking propeller EWM00321 WARNING You could be seriously injured if the en- gine accidentally starts when you are near the propeller. Before inspecting, removing, or install- ing the propeller, remove the spark plug caps from the spark plugs. Also, place ZMU01897 the shift control in neutral, turn the main Checkpoints...
Be sure to use a new cotter pin and bend the ends over securely. Otherwise the propeller could come off during opera- tion and be lost. Apply Yamaha marine grease or a corro- sion resistant grease to the propeller shaft. Install the thrust washer and propeller on the propeller shaft.
ECM00710 CAUTION: Inspect the used oil after it has been drained. If the oil is milky, water is getting into the gear case which can cause gear damage. Consult a Yamaha dealer for re- pair of the lower unit seals.
Maintenance EMU29312 NOTE: Inspecting and replacing anode(s) For disposal of used oil, consult your Yamaha Yamaha outboard motors are protected from dealer. corrosion by sacrificial anodes. Inspect the external anodes periodically. Remove scales With the outboard motor in a vertical po- from the surfaces of the anodes.
Maintenance Drink large quantities of water or milk followed by milk of magnesia, beaten egg, or vegetable oil. Get immediate medical attention. Batteries also generate explosive hydro- gen gas; therefore, you should always fol- low these preventive measures: Charge batteries in a well-ventilated ar- Keep batteries away from fire, sparks, or open flames (for example: welding equipment, lighted cigarettes, and so...
If the battery will be stored for longer than minal. a month, check the specific gravity of the fluid at least once a month and recharge the battery when it is low. NOTE: Consult a Yamaha dealer when charging or re-charging batteries. EMU30730 Connecting the battery EWM00570 WARNING 1.
NOTE: copper or graphite. These paints can cause If connecting an accessory battery, consult more rapid engine corrosion. your Yamaha dealer about correct wiring. EMU29370 Disconnecting the battery Disconnect the BLACK cable from the NEGA- TIVE (-) terminal first. Then disconnect the RED cable from the POSITIVE (+) terminal.
Yamaha outboard motors. Therefore Q. Has fuel pump malfunctioned? some items may not apply to your model. A. Have serviced by a Yamaha dealer. If your outboard motor requires repair, bring it to your Yamaha dealer. Q. Are spark plug(s) fouled or of incorrect...
Page 75
A. Return to normal operating position. A. Fill tank with clean, fresh fuel. Q. Is carburetor clogged? Q. Is fuel filter clogged? A. Have serviced by a Yamaha dealer. A. Clean or replace filter. Q. Is fuel joint connection incorrect? Q. Have ignition parts failed? A.
Page 76
Q. Is fuel system obstructed? Q. Is water pump or thermostat faulty? A. Check for pinched or kinked fuel line or oth- A. Have serviced by a Yamaha dealer. er obstructions in fuel system. Q. Is there excess water in fuel filter cup? Q.
If the boat is operated with one engine in Q. Is steering pivot loose or damaged? the water but not running, water may run A. Tighten or have serviced by a Yamaha into the exhaust pipe due to wave action, dealer.
3. Spare fuse (5 A, 10 A, 15 A, 20 A, 30 A, 80 NOTE: Consult your Yamaha dealer if the new fuse immediately blows again. 1. Electric throttle valve / ECM (Electronic con- trol module) fuse (10 A) 2.
Trouble Recovery The fuel filter must be reassembled 8. Isolator fuse (80 A) carefully with the O-ring, filter cup, and EMU29522 Power trim and tilt / power tilt will not hoses in place. Improper assembly or operate replacement could result in a fuel leak, If the engine cannot be tilted up or down with which could result in a fire or explosion the power trim and tilt / the power tilt because...
Page 80
Trouble Recovery NOTE: Be careful not to twist the water detection switch lead when unscrewing the filter cup. 1. Filter cup 2. Water detection switch lead Drain the water in the filter cup by soaking it up with a rag. NOTE: 1.
EMU29760 Treatment of submerged motor If the outboard motor is submerged, immedi- ately take it to a Yamaha dealer. Otherwise some corrosion may begin almost immediate- If you cannot immediately take the outboard motor to a Yamaha dealer, follow the proce- dure below in order to minimize engine dam- age.