Mauro Brisola
Seaman Apprentice
- Joined
- Jun 13, 2016
- Messages
- 31
350 MAG suffered Bravoits. With 150 salt water hours. A "experienced" Mercruiser mechanic did the work to solve overheat problem.
I did not followed the work because I live far from the marina where boat is.
What I know is outdrive was removed and engine raised in order to gain access to transom.
Overheat issue is past. Now engine temperature is about 158-160.
But there is new problem obviously related to the service that was performed: with low trim engine operation is smoth. No matter engine speed.
But trying, when cruising, to adjust trim to about "4" in the Mercruiser trim gauge scale (middle is 5) it starts a abnormal vibration, Not a terrible vibration but strong enough to shake and starting make some noise. Before this service boat was perfect. No vibrations in this situation at all.
Now problem starts because mechanic first reaction is to claim it was a pre existing-problems... What is not true.
My doubt: considering the removal and installation of outdrive what the most probable vibration cause in this case?
Thank you
I did not followed the work because I live far from the marina where boat is.
What I know is outdrive was removed and engine raised in order to gain access to transom.
Overheat issue is past. Now engine temperature is about 158-160.
But there is new problem obviously related to the service that was performed: with low trim engine operation is smoth. No matter engine speed.
But trying, when cruising, to adjust trim to about "4" in the Mercruiser trim gauge scale (middle is 5) it starts a abnormal vibration, Not a terrible vibration but strong enough to shake and starting make some noise. Before this service boat was perfect. No vibrations in this situation at all.
Now problem starts because mechanic first reaction is to claim it was a pre existing-problems... What is not true.
My doubt: considering the removal and installation of outdrive what the most probable vibration cause in this case?
Thank you