[C320-list] New Engine Mounts

[Kirk McCullough]

Good question Martin

I'm going to discuss it with the Perkins guys I usually go to for engine 
work. I have a small oil drip from the area where the throttle linkage 
connects to the fuel injector unit. So when they do that I'llget their 
comments on the engine mounts, harder or softer ect.

Kirk
#124
----- Original Message ----- 
From: "Martin Raphael" <mraphael at q.com>
To: <C320-List at Catalina320.com>
Sent: Sunday, June 01, 2008 7:16 PM
Subject: Re: [C320-list] New Engine Mounts


> Just a thought here...the engine will vibrate the same way in relation to 
> RPM whether you have old or new engine mounts, wouldn't it?  Engine mounts 
> will affect how that vibration is transmitted to the hull, and thus what 
> we hear or feel.  Stiffer mounts will transmit more directly to the 
> hull...softer mounts will absorb vibration.  So I wonder if Mike's new 
> mounts were actually "softer" than the worn mounts he replaced.  I say 
> this because some years ago (2003) I had new engine mounts installed, and 
> the engine noise and vibration, especially at low RPMs, went up 
> tremendously.  I have always thought this was because the new engine 
> mounts were much stiffer than the originals.  Other thoughts?
> Martin Raphael
> Rhapsody #108
> ----- Original Message ----- 
> From: "Kirk McCullough" <kirk.mccullough at telus.net>
> To: <C320-List at Catalina320.com>
> Sent: Wednesday, May 28, 2008 9:18 AM
> Subject: Re: [C320-list] New Engine Mounts
>
>
>> Mike
>>
>> Good advice, I'll add new mounts to the list. I have always put up with 
>> the "Perkins shudder" at low RPM, made even a little worse with the high 
>> pitched Kiwi prop when in reverse.
>>
>> Kirk
>> #124
>> ----- Original Message ----- 
>> From: "Mike Shoffner" <drshoffner at yahoo.com>
>> To: <c320-list at lists.catalina320.com>
>> Sent: Sunday, May 25, 2008 6:08 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
>>
>>
>>
>>
>>
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