Breaking In Engine; Procedure For 4-Stroke Models; Pre-Operation Checks; Fuel - Yamaha F100D Owner's Manual

Incorrect engine height or obstructions
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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 transducers) can create air-
borne water spray while the boat is
cruising. If the motor is operated contin-
uously in the presence of airborne water
spray, enough water could enter the en-
gine through the intake opening on the
cowling to cause severe engine dam-
age. Eliminate the cause of the airborne
water spray.
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.
EMU27083

Procedure for 4-stroke models

Your new engine requires a period of ten-
hours break-in to allow mating surfaces of
moving parts to wear in evenly. Correct break-
in will help ensure proper performance and
longer engine life.
NOTE:
Failure to follow the break-in procedure could
result in reduced engine life or even severe
engine damage. Run the engine in the water,
under load (in gear with a propeller installed)
as follows. For ten hours for breaking in en-
gine avoid extended idling, rough water and
crowded areas.
1. For the first hour of operation:
Run the engine at varying speeds up to
2000 r/min or approximately half throttle.
2. For the second hour of operation:
Increase engine speed as much as nec-
essary to put the boat on plane (but avoid
full-throttle operation), then back off on
the throttle while keeping the boat at a
planing speed.
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.
EMU27104

Pre-operation checks

EWM00081
WARNING
If any item in the pre-operation check is
not working properly, have it inspected
and repaired before operating the out-
board motor. Otherwise an accident could
occur.
ECM00120
CAUTION:
Do not start the engine out of water. Over-
heating and serious engine damage can
occur.
EMU31551

Fuel

Check to be sure you have plenty of fuel for
G
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).
Operation
35