Serious Vibration-Volvo Penta 175

[tspoon]

I have an 18' Glastron with a Volo Penta 175 3.0. When the engine is in neutral and running wide open, I have a serious vibration that sound like it is under the boat. When I turn the steering wheel either direction, the vibration gets worst. I can raise the trim a little and the vibration goes away until I turn. Could it be the prop? Please help!! Make mechanic education is, well, None. Any suggestions?

 

[akriverrat]

Re: Serious Vibration-Volvo Penta 175

u joints. or gimbal bearing. if it's in neutral it's not the prop. something befor cone clutch in upper. this might help. .http://www.marinemechanic.com/volvo/volvo-home.htm

 

[hondon]

Re: Serious Vibration-Volvo Penta 175

Why in the world are you running your engine at wide open in neutral?All kinds of bad things happen in that situation.

 

[f_inscreenname]

Re: Serious Vibration-Volvo Penta 175

Try it under load (in the water, in gear). Most Volvo’s use a vibration damper bolted to the fly wheel. This is a plate with a spring loaded coupler in the middle of it. With no load on the springs they tend to bounce around in the damper and make a rattling noise (like a spoon banging on a pie tin).

 

[magster65]

Re: Serious Vibration-Volvo Penta 175

hondon, I think he meant 'in neutral or wide open' (not and). My SeaRay had a vibration too although it wasn't what I'd call bad but rather noticeable, it was the u-joints.