[C320-list] Diesel vibration, 1999 Yanmar

[Jeff Hare]

BTW, our motor mounts are original and while they have some play, the engine
only has one *minor* resonance point in the RPM curve when motoring that is
easily avoided by bumping the speed up or down ~100rpm.  It makes one of the
cockpit latches vibrate (which is about all we notice).

We'd replace them but they're expensive and we found that using the formula
on the C320 website, we were able to get our prop shaft coupler & engine
really finely aligned in about an hour.

-Jeff

-----Original Message-----
From: C320-list [mailto:c320-list-bounces at lists.catalina320.com] On Behalf
Of Denny Browne
Sent: Tuesday, June 17, 2014 8:31 AM
To: C320-List at Catalina320.com
Subject: Re: [C320-list] Diesel vibration, 1999 Yanmar

My Yanmar does that. Sounds like it stalled, but it doesn't. I haven't
recently checked the motor mounts, but replaced all of them three years ago.


Denny Browne
A Cappella #935
Redondo Beach

Sent from iPhone, sorry for typos, grammar, etc...

> On Jun 17, 2014, at 5:23 AM, JJ Morrison <sail-ability at sympatico.ca>
wrote:
> 
> Have you checked the motor mounts? The engine should not shudder under the
circumstances you describe; been around a lot of engines and never saw such
a thing unless there was an issue with the engine.CheersJohnM1999#574
> 
>> From: bhutt at windstream.net
>> Date: Tue, 17 Jun 2014 08:16:24 -0400
>> To: C320-List at Catalina320.com
>> Subject: [C320-list] Diesel vibration, 1999 Yanmar
>> 
>> Group,
>> 
>> While we're on the subject, when I quickly rev down the engine (as when
docking) I get a terrible shudder. If I rev down slowly, no issues.
>> When I first got the boat the mechanic said no big deal. Other than that
engine seems to run fine.
>> Any ideas/ suggestions?
>> Thanks,
>> Bill Hutt
>> Caribbean Soul
>> Cleveland, Ohio
>> 
>> Sent from my iPad
>