[C38] Vibration

[Steve Smolinske]

Kerry when ever I get vibration bad enough to notice it is usually from
my forward mounting bolt working its way loose. 

________________________________

From: listserve-bounces at catalina38.org
[mailto:listserve-bounces at catalina38.org] On Behalf Of
littlebreeze at comcast.net
Sent: Wednesday, July 08, 2009 7:04 AM
To: Catalina 38 Listserve
Subject: Re: [C38] Vibration


I'm sorry, I should have mentioned that the prop is the factory fixed
two blade prop.

Kerry
----- Original Message -----
From: "Bob Porter" <hiawatha at localnet.com>
To: "Catalina 38 Listserve" <listserve at catalina38.org>
Sent: Wednesday, July 8, 2009 2:45:07 AM GMT -08:00 US/Canada Pacific
Subject: Re: [C38] Vibration

? 
Is there anything that could have changed the balance of your prop. I
has a martec folding prop with a slight imbalance and it caused quite a
vibration, dependent on speed.
 
Bob Porter

	----- Original Message ----- 
	From: littlebreeze at comcast.net 
	To: Listserve, Catalina <mailto:listserve at catalina38.org>  
	Sent: Wednesday, July 08, 2009 2:12 AM
	Subject: [C38] Vibration

	I recently had my boat in for a bottom job.  While there the
strut was found to be loose.  I had the strut repaired and now there is
a vibration.  At first the vibration was so violent to broke the hose
clamps on the packing gland hose.  Then the engine was realigned and
most the vibration was gone.  The vibration which is left is still
enough to vibrate the steering pedestal.  When I bought the boat 5 years
ago I brought it up the coast on the motor and there wasn't a vibration
and when I took to have the bottom repaired there wasn't a vibration.
Now it is logical to believe that the vibration was there you just
couldn't feel it because the strut was loose and now that it is rigid
again you can feel the vibration.  The other thing which is of concern
is that the propeller is mounted within 1/4 inch of the strut, but there
is another Catalina 38 in the same yard and the propeller is
approximately 1 foot from the strut.  (of course is has been a month and
I did not measure the distance between the strut and the prop).  I think
there could be a correlation between the location of the prop/strut and
the vibration.  
	
	So I have several questions.  First, for those of you who have
had you boats out of the water recently, what is the distance between
your prop and the strut.  Second, any Ideas on the vibration?  Third, I
know some of you have had to deal with vibrations in the past, what have
you done to rectify your problems?
	
	Kerry Grimes
	Littlebreeze, 139
	San Francisco
	
	   
	

	

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