Bertram31.com General Bulletin Board

Re: Velvet Clunk

Posted By: JP
Date: Tuesday, 17 January 2006, at 10:06 a.m.

In Response To: Re: Velvet Clunk (Charlie Haws)

I'm pretty sure that marine transmissions have to add a third gear on one side in order to get counter rotation between port and starboard engines (assuming yours is a 4 stroke and both engines fire in the same direction).
The clunk you hear may be the gear lash (total spacing between teeth) during engagement-hey its a theory. If it really bugs you moving to the heavy side of the oil use guidlines may reduce increase engagement time and reduce the clunk.
We have a set of twin discs behind Cummins engines and one gear clunks in reverse.
No worries yet.
Good Luck

KR
JP

Messages In This Thread

Velvet Clunk
Paul J -- Tuesday, 17 January 2006, at 6:42 a.m.

Re: Velvet Clunk
Charlie Haws -- Tuesday, 17 January 2006, at 9:30 a.m.

Re: Velvet Clunk
JP -- Tuesday, 17 January 2006, at 10:06 a.m.

Re: Velvet Clunk
Walter Kaprielian -- Tuesday, 17 January 2006, at 12:01 p.m.

Re: Velvet Clunk
Jim W -- Tuesday, 17 January 2006, at 1:00 p.m.

Re: Velvet Clunk
Carl -- Tuesday, 17 January 2006, at 3:01 p.m.

Re: Velvet Clunk
Bruce -- Tuesday, 17 January 2006, at 7:38 p.m.

Re: Velvet Clunk
Paul J -- Wednesday, 18 January 2006, at 11:53 a.m.

Re: Velvet Clunk
Paul J -- Tuesday, 17 January 2006, at 6:13 p.m.

Re: Velvet Clunk
andre fourrier-Louisiana -- Tuesday, 17 January 2006, at 8:41 p.m.