[C320-list] New Engine Mounts

[Mike Shoffner]

Don,
 
My engine only has about 325 hours.  The major factor, however, may just be the years of pressure on the rubber of the mounts accompanied by the natural break down in the rubber over time.  Whatever the cause, the result was impressive.   The engine noise on my boat had always been a bother to me, and I had added sound insulation which had helped some, but the new mounts helped at least as much as the insulation.  I had also set my idle speed up to about 1100 rpm's to prevent vibrations while motoring at idle speed, and even then I'd have to bump it up a bit at times.  Now all that is eliminatedn and I can idle at 800 rpm's with no vibration at all.  There's also a noticeable reduction in vibration at higher rpm's as well.
 
Mike



----- Original Message ----
From: "brer at adelphia.net" <brer at adelphia.net>
To: C320-List at Catalina320.com
Cc: Chris Block ..._/)...._/}... <chris_block at comcast.net>
Sent: Sunday, May 25, 2008 11:41:32 PM
Subject: Re: [C320-list] New Engine Mounts

Sounds like a great fix. How many hours are on your Perkins?

Don




---- "Chris Block ..._/)...._/}..." <chris_block at comcast.net> wrote: 

=============
did you do the change?  where did you buy the parts?  how much for the 
parts? labor?

Chris

Amore #139


----- Original Message ----- 
From: "Mike Shoffner" <drshoffner at yahoo.com>
To: <c320-list at lists.catalina320.com>
Sent: Sunday, May 25, 2008 8:08 PM
Subject: [C320-list] New Engine Mounts


Over the years there have been threads devoted to the vibrations at low 
RPM's of the older boats with Perkins engines. I've noted this with my boat 
ever since I boughtit 4 years ago, and I've just attributed it to being a 
characteristic of the Perkins engine. Recently, because of my cutless 
bearing wearing out in one season of use, I had my shaft allignment checked 
and was advised I needed new engine mounts. What a difference!! The old 
"Perkins vibrations" apparently were due to worn engine mounts' and with new 
mounts there are zero vibrations at low RPM's. At higher RPM's engine noise 
and vibrations are also noticably reduced as well. Mine is a '94 model and 
probably needed new mounts for several years. I would advise owhners of more 
mature boats to consider having their engine mounts replaced if they're 
having problems similar to mine.
Regards,
Mike
#171