[C320-list] Engine / shaft alignment

[Jeff Church]

Scott,

Take a closer look at the lower portion of the motor mount where it bolts 
into the engine bunk. The aft holes on the aft mounts and the forward holes 
on the forward mounts are elongated so that the engine can be angled or 
shifted laterally.

JeffC


----- Original Message ----- 
From: "Scott Thompson" <sthompson at toad.net>
To: "C320-List" <C320-List at catalina320.com>
Sent: Saturday, May 20, 2006 8:36 PM
Subject: [C320-list] Engine / shaft alignment


> Surprise now has a Gori 2 blade folding prop to replace the 3 blade fixed. 
> So far I'm satisfied, except that there is definitely quite a bit more 
> vibration under power than before.  Today I tried to tackle this by doing 
> a shaft alignment.  This is a job I've ignored since owning the boat and 
> have been rather nervous about that situation.  When I unbolted the 
> flanges I found that the engine flange did not line up well with the 
> shaft, and was a bit higher.  I was able to get the alignment much better 
> in the fore-aft plane using the adjustment advice in my owners manual, but 
> was left with somewhat excessive side to side misalignment.  To be 
> precise, the two flanges have good axial alignment and are even top to 
> bottom, but there is a bit of a gap (about .014 inches by my feeler gauge 
> on the starboard side.  I can't figure out how to tune this out.  It would 
> seem to require moving the front of the engine slightly to starboard, but 
> I don't see any way to adjust the engine mounts laterally.  How is this 
> supposed to be done?  I have the Yanmar 3GM30F, 1999 model.
>
> Scott Thompson
> Surprise, 653
>
>