Operation; First-Time Operation; Filling Engine Oil; Breaking In Engine - Yamaha VF150 Owner's Manual

Operation

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First-time operation

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Filling engine oil

The outboard motor is shipped from the fac-
tory without engine oil. If your Yamaha dealer
did not fill the engine with engine oil, you
must fill the engine before starting it.
NOTICE: Make sure that the engine is filled
with engine oil before operating the out-
board motor for the first time. Otherwise,
the engine could be damaged severely.
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The following tag, which is fitted on the out-
board motor when it is shipped from the fac-
tory, should be removed after the engine is
filled with engine oil for the first time. For
more information on checking the engine oil
level, see page 56.
54
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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. NOTICE: Failure to follow the break-in
procedure could result in reduced engine
life or even severe engine damage.
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Procedure for breaking in engine
Your new engine requires a period of 10
hours break-in so that mating surfaces of
moving parts wear in evenly.
Operate the engine in the water under load (in
gear with a propeller installed) for 10 hours as
follows. When breaking in the engine, avoid
extended idling, rough water, and crowded
areas.
1. For the 1st hour of operation:
Operate the engine at varying speeds up
to 2000 r/min or approximately 1/2 throt-
tle.
2. For the 2nd hour of operation:
Increase the engine speed until the boat
is on plane (but avoid full-throttle opera-
tion), and then back off on the throttle
while keeping the boat at a planing
speed.
3. For the remaining 8 hours of operation:
Operate the engine at any speed. How-
ever, avoid operating at full throttle for
more than 5 minutes at a time.
4. After the 1st 10 hours of operation:
Operate the engine normally.
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Getting to know your boat

All boats have unique handling characteris-
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tics. Operate cautiously while you learn how
your boat handles under different conditions
and various trim angles (see page 65).
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