[C320-list] Knock, knock, who's there?

[Jim Sweet]

After 2 years of screwing around (re-epoxy of the rudder post, numerous 
sails with mechanics, etc.) we finally got the knocking sound that appeared 
on hard port turns fixed.  It is the shaft just slightly out of alignment 
(something that was posited and rejected early on).  Re-alignment of the 
shaft has stopped the annoying knock and the boat is quiet again.

Jim Sweet
TGIF (Thank God It Floats) 902
----- Original Message ----- 
From: "B. Stumpp" <bstumpp at comcast.net>
To: <c320-list at lists.catalina320.com>
Sent: Sunday, May 10, 2015 4:40 PM
Subject: [C320-list] Knock, knock, who's there?


> We went out for our first Spring sail this afternoon.  Everything worked
> great BUT with the engine running and turning left I get a knocking sound
> with what seems like every revolution of the prop shaft.  It does not make
> the noise when going straight, turning right or in either direction in
> reverse.     If I speed up the engine the noise  goes faster.  I stuck my
> head in the engine compartment both in front of and behind the bulkhead,
> the sound is emanating farther back towards the stern.  It's not  a real
> loud knock but kind of like someone lightly tapping on the deck with a
> hammer as a surveyor does when checking for moisture.   Before we launched
> the cutlass bearing and strut all seemed fine.  Has anyone experienced 
> this
> before?
>
>
>
> Bruce Stumpp
>
> Adventure, #647
>
> Frog Mortar Creek, Maryland
>
>
>