Yamaha 9.9F Owner's Manual

Also see for 15F: Owner's manual Owner's manual Owner's manual Owner's manual Owner's manual

Contents

Operation22EMU36381First-time operationEMU30174Breaking in engineYour new engine requires a period of break-into allow mating surfaces of moving parts towear in evenly. Correct break-in will help en-sure proper performance and longer enginelife. NOTICE: Failure to follow the break-inprocedure could result in reduced enginelife or even severe engine damage. [ECM00801]EMU27050Gasoline and engine oil mixing chart(25:1)NOTICEECM00150Be sure to mix gasoline and oil complete-ly, otherwise the engine may be damaged.EMU27074Procedure for pre-mixed modelsRun the engine under load (in gear with a pro-peller installed) for 10 hours as follows.1. First 10 minutes:Run the engine at the lowest possiblespeed. A fast idle in neutral is best.2. Next 50 minutes:Do not exceed half throttle (approximate-ly 3000 r/min). Vary engine speed occa-sionally. If you have an easy-planingboat, accelerate at full throttle onto plane,then immediately reduce the throttle to3000 r/min or less.3. Next two hours:Accelerate at full throttle onto plane, thenreduce engine speed to three-quarterthrottle (approximately 4000 r/min). Varyengine speed occasionally. Run at fullthrottle for one minute, then allow about10 minutes of operation at three-quarterthrottle or less to let the engine cool.4. Remaining seven hours:Run the engine at any speed. However,avoid operating at full throttle for morethan 5 minutes at a time.5. After the first 10 hours:Operate the engine normally. Use thestandard premix ratio of gasoline and oil.For details on mixing fuel and oil, seepage 24.EMU36400Getting to know your boatDifferent boats handle differently. Operatecautiously while you learn how your boat han-dles under different conditions and with differ-ent trim angles (see page 31).EMU36413Checks before starting engineWARNINGEWM01921If any item in “Checks before starting en-gine” is not working properly, have it in-spected and repaired before operating theoutboard motor. Otherwise, an accidentcould occur.NOTICEECM00120Do not start the engine out of water. Over-heating and serious engine damage canoccur.EMU37141Fuel levelBe sure you have plenty of fuel for your trip. Agood rule is to use 1/3 of your fuel to get to thedestination, 1/3 to return, and to keep 1/3 as1. : Gasoline2. : Engine oil