(3) Are there abnormal vibrations or noise?
Do not operate at speeds which produce
violent vibrations. Depending on the hull
structure, engine and hull resonance may
suddenly become great at a certain
engine speed range, causing heavy
When operating the engine at low speed for long periods of time, race the engine once every 2 hours.
Note: Racing the Engine
With the clutch in NEUTRAL,
accelerate from the low speed
position to the high speed position
and repeat this process about 5
times. This is done to clean out
carbon from the cylinders and the
fuel injection valve.
Neglecting to race the engine will
result in poor exhaust colour and
Thanks everyone. This has been helpful. I have found over the last 2 years of owning this boat that the "sweet spot" is around 2800 rpm's. She seems to like this. I just wanted to confirm that I was doing the right thing. Thanks again.