Yamaha F25 User Manual

F2.5OWNER’S MANUALLIT-18626-07-0469M-F8199-15U.S.A.Edition

General information5● Turn the fuel cock to the “closed” posi-tion.● Tighten the air-vent screw on the fueltank cap.EMU25465Caution labelsEMU25482Labe

General information6“The general prudential rule”This rule is called Rule 2 in the InternationalRules and says,“In obeying and construing these rules

General information7OvertakingIf you are passing another vessel, you are the“Give-Way” vessel. This means that the othervessel is expected to maintain

General information8System has been devised for these waters.This system uses buoys and signs with dis-tinctive shapes and colors to show regulatoryor

General information9EMU31490Fueling instructionsWARNINGEWM01490GASOLINE AND ITS VAPORS ARE HIGH-LY FLAMMABLE AND EXPLOSIVE!● Do not smoke when refueli

General information10CAUTION:ECM01050All 4-stroke engines are shipped from thefactory without engine oil.EMU25742Propeller selectionThe performance of

Basic components11EMU25797Main componentsNOTE:* May not be exactly as shown; also may not be included as standard equipment on all models.EMU25821Fuel

Basic components12EMU25850Fuel tank capThis cap seals the fuel tank. When removed,the tank can be filled with fuel. To remove thecap, turn it counterc

Basic components13EMU25930Gear shift leverPulling the gear shift lever towards you putsthe engine in forward gear so that the boatmoves ahead.EMU25941

Basic components14EMU25990Engine stop lanyard switchThe lock plate must be attached to the enginestop switch for the engine to run. The lanyardshould

ZMU01690Read this owner’s manual carefully before operating your outboard motor.U69M15E0.book Page 1 Wednesday, April 5, 2006 4:48 PM

Basic components15EMU26122Steering friction adjusterA friction device provides adjustable resis-tance to the steering mechanism, and can beset accordi

Basic components16EMU26450Carrying handleA carrying handle is provided on the rear ofthe outboard motor. It enables you to carry theoutboard motor eas

Operation17EMU26901InstallationCAUTION:ECM00110Incorrect engine height or obstructions tosmooth water flow (such as the design orcondition of the boat

Operation18tends to occur, thus reducing the propulsion;and if the propeller tips cut the air, the enginespeed will rise abnormally and cause the en-g

Operation19WARNINGEWM00650Avoid using bolts, nuts or washers otherthan those contained in the engine pack-aging. If used, they must be of at least the

Operation20with oil if it is below the lower mark, ordrain to the specified level if it is abovethe upper mark.EMU30850Filling fuel for built-in tankW

Operation21EMU27450Operating engineEMU31510Feeding fuelWARNINGEWM00420● Before starting the engine, make surethat the boat is tightly moored and thaty

Operation22● Do not attach the lanyard to clothingthat could tear loose. Do not route thelanyard where it could become entan-gled, preventing it from

Operation23● If the engine does not start on the first try,repeat the procedure. If the engine fails tostart after 4 or 5 tries, open the throttle asm

Operation242. Move the gear shift lever quickly and firm-ly from neutral to forward.Remote control modelsPull up the neutral interlock trigger (ifequi

Important manual informationEMU31280To the ownerThank you for choosing a Yamaha outboardmotor. This Owner’s Manual contains infor-mation needed for pr

Operation25EMU27820Stopping engineBefore stopping the engine, first let it cool offfor a few minutes at idle or low speed. Stop-ping the engine immedi

Operation26EMU27872Adjusting trim angle for manual tilt modelsThere are 4 or 5 holes provided in the clampbracket to adjust the outboard motor trim an

Operation27Bow DownToo much trim-in causes the boat to “plow”through the water, decreasing fuel economyand making it hard to increase speed. Operat-in

Operation28EMU27964Procedure for tilting up (manual tilt models)1. Place the gear shift lever in neutral (ifequipped) and face the outboard motorforwa

Operation29locked position. If the tilt support lever/bardoes not automatically lock, swing the motora little to the left and right.EMU28032Procedure

Maintenance30EMU31480SpecificationsNOTE:“(AL)” stated in the specification data belowrepresents the numerical value for the alumi-num propeller instal

Maintenance31EMU28222Transporting and storing out-board motorWARNINGEWM00690● Leaking fuel is a fire hazard. When trans-porting and storing the outboa

Maintenance32NOTE:Place a towel or something similar under theoutboard motor to protect it from damage.EMU28241Storing outboard motorWhen storing your

Maintenance33CAUTION:ECM00300Do not run the engine without supplying itwith cooling water. Either the engine waterpump will be damaged or the engine w

Maintenance34NOTE:For cooling system flushing instructions, seepage 31.EMU28460Checking painted surface of motorCheck the motor for scratches, nicks,

Table of contentsGeneral information ... 1Identification numbers record... 1Outboard motor serial number ... 1

Maintenance35EMU28522Maintenance chartFrequency of maintenance operations may be adjusted according to the operating conditions,but the following tabl

Maintenance36EMU28874Maintenance chart (additional)EMU28931GreasingYamaha marine grease (Water resistant grease)EMU28952Cleaning and adjusting spark p

Maintenance37problem in that cylinder. Do not attempt to di-agnose any problems yourself. Instead, takethe outboard motor to a Yamaha dealer. Youshoul

Maintenance38● Fuel line cracks or other damage● Fuel connector leakageEMU29041Inspecting idling speedWARNINGEWM00451● Do not touch or remove electric

Maintenance392. Prepare a suitable container that holds alarger amount than the engine oil capaci-ty. Loosen and remove the drain screwwhile holding t

Maintenance40with oil if it is below the lower mark, ordrain to the specified level if it is abovethe upper mark.7. Dispose of used oil according to l

Maintenance41Checkpoints● Check each of the propeller blades forwear, erosion from cavitation or ventilation,or other damage.● Check the propeller sha

Maintenance422. Install the spacer (if equipped), thrustwasher, and propeller on the propellershaft.3. Install the spacer (if equipped) and thewasher.

Maintenance436. Put a new gasket on the oil level plug.When the oil begins to flow out of the oillevel plug hole, insert and tighten the oillevel plug

Maintenance44U69M15E0.book Page 44 Wednesday, April 5, 2006 4:48 PM

Table of contentsCleaning and anticorrosion measures ... 33Cleaning the outboard motor... 33Checking pai

Trouble Recovery45EMU29424TroubleshootingA problem in the fuel, compression, or ignitionsystems can cause poor starting, loss of pow-er, or other prob

Trouble Recovery46A. Check for pinched or kinked fuel line or oth-er obstructions in fuel system.Q. Is fuel contaminated or stale?A. Fill tank with cl

Trouble Recovery47Q. Is load on boat improperly distributed?A. Distribute load to place boat on an evenplane.Q. Is water pump or thermostat faulty?A.

Trouble Recovery48A. Connect correctly.Q. Is heat range of spark plug incorrect?A. Inspect spark plug and replace it with rec-ommended type.Q. Is high

Trouble Recovery49● Do not attach the lanyard to clothingthat could tear loose. Do not route thecord where it could become entangled,preventing it fro

Trouble Recovery507. Remove the starter case by pulling it to-wards you.8. Install the fuel tank bracket by installingthe bolts.9. Install 2 bolts int

Trouble Recovery51EMU29760Treatment of submerged motorIf the outboard motor is submerged, immedi-ately take it to a Yamaha dealer. Otherwisesome corro

Consumer information52EMU29811Important warranty information for U.S.A. and CanadaU69M15E0.book Page 52 Wednesday, April 5, 2006 4:48 PM

Consumer information53U69M15E0.book Page 53 Wednesday, April 5, 2006 4:48 PM

Consumer information54EMU29830YAMAHA MOTOR CORPORATION, U.S.A. FOUR-STROKE OUTBOARD MOTOR THREE-YEAR LIMITED WARRANTYU69M15E0.book Page 54 Wednesday

General information1EMU25170Identification numbers recordEMU25183Outboard motor serial numberThe outboard motor serial number is stampedon the label a

Consumer information55U69M15E0.book Page 55 Wednesday, April 5, 2006 4:48 PM

Consumer information56EMU29841IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR YAMAHA OUTSIDE THE USA OR CANADAU69M15E0.book Page 56 Wednesday, April

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January 2006–0.3 × 1 CRPrinted in FranceYAMAHA MOTOR CORPORATION, USA

Warranty card 12/6/01 7:40 PM Page 1

Warranty card 12/6/01 7:40 PM Page 2

General information2EMU25272Star labelsYour outboard motor is labeled with a Califor-nia Air Resources Board (CARB) star label.See below for a descrip

General information3EMU25362 Safety information● Before mounting or operating the outboardmotor, read this entire manual. Reading itshould give you an

General information4limits, and the limits of your boat. Alwaysoperate at safe speeds, and keep a carefulwatch for obstacles and other traffic.● Alway