by Brad
(South Australia)
Motor starts well and runs good but when you accelerate to around 3500 revs it becomes noisy. Vibrates and lacks power. This occurs between 3500 revs to 4500 revs. Once past 4500 it runs better.
They have put a size 19 prop on this motor Could a smaller prop 17 fix this problem?
This motor is new. 4 months since fitted and has done this from the start.
What else could it be?
Boat motor supplier never tested it the water have just done the 1st service and said it runs normal diagnostics
Motor is fitted to a 2004 Quintrex replacing a 115 Johnson 2 stroke