20-Hour Break-In Period - Mercury V-6 series User Manual

CA413

20-Hour Break-In Period

IMPORTANT: The first 20 hours of operation is the engine
break-in period. Correct break-in is essential to obtain
minimum oil consumption and maximum engine performance.
During this break-in period, the following rules must be
observed:
Do not operate below 1500 RPM for extended periods of time for
first 10 hours. Shift into gear as soon as possible after starting and
advance throttle above 1500 RPM if conditions permit safe
operation.
Do not operate at one speed consistently for extended periods.
Do not exceed 3/4 throttle during first 10 hours. During next 10
hours, occasional operation at full throttle is permissible (5
minutes at a time maximum).
Avoid full throttle acceleration from IDLE speed.
Do not operate at full throttle until engine reaches normal
operating temperature.
Frequently check crankcase oil level. Add oil if needed. It is
normal for oil consumption to be high during break-in period.
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