Breaking In Engine; Procedure For 4-Stroke Models; Preoperation Checks; Fuel - Yamaha F15C Owner's Manual

Operation
1
1. Bolts
EMU30173

Breaking in engine

Your new engine requires a period of break-
in to allow mating surfaces of moving parts to
wear in evenly. Correct break-in will help en-
sure proper performance and longer engine
life.
ECM00800
CAUTION:
Failure to follow the break-in procedure
could result in reduced engine life or
even severe engine damage.
EMU27081

Procedure for 4-stroke models

Run the engine under load (in gear with a
propeller installed) for 10 hours as follows.
1. First hour:
Run the engine at 2000 r/min or at ap-
proximately half throttle.
2. Second hour:
Run the engine at 3000 r/min or at ap-
proximately three-quarter throttle.
3. Remaining eight hours:
Run the engine at any speed. However,
avoid operating at full throttle for more
than 5 minutes at a time.
4. After the first 10 hours:
Operate the engine normally.
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EMU27103
EWM00080
WARNING
If any item in the preoperation check is
not working properly, have it inspected
and repaired before operating the out-
board motor. Otherwise an accident
could occur.
ZMU02637
ECM00120
CAUTION:
Do not start the engine out of water. Over-
heating and serious engine damage can
occur.
EMU27111

Fuel

Check to be sure you have plenty of fuel
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for your trip.
Make sure there are no fuel leaks or gaso-
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line fumes.
Check fuel line connections to be sure they
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are tight (if equipped Yamaha fuel tank or
boat tank).
Be sure the fuel tank is positioned on a se-
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cure, flat surface, and that the fuel line is
not twisted or flattened, or likely to contact
sharp objects (if equipped Yamaha fuel
tank or boat tank).
EMU27130

Controls

Check throttle, shift, and steering for prop-
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er operation before starting the engine.
The controls should work smoothly, with-
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out binding or unusual free play.
Look for loose or damaged connections.
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Check operation of the starter and stop
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switches when the outboard motor is in the
water.
EMU27140

Engine

Check the engine and engine mounting.
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Preoperation checks