[C320-list] Water Pump Leak, Fuel Leak Questions

[Paul]

I have Hull #722 so our pumps could be the same.  I had the same issue last 
year.  I was told that the only fix was a new pump.  My seal broke as a 
result of trying to tighten the belts.  I had put some pressure with a large 
screw driver against the pulley to try and pull the belt tight.  In the 
process I broke the seal and the pump had to be replaced.  It didn't take 
much.  The entire pump is sold together including impellor.  Cost was 
somewhere around $200.  We have a Yanmar dealer in our marina so I was able 
to get the part immediately.  Sorry, but I don't know the part number.

Paul Adison
Rough Draft #722

-----Original Message----- 
From: Dennis Harris
Sent: Monday, January 17, 2011 10:18 AM
To: C320-List at Catalina320.com
Subject: [C320-list] Water Pump Leak, Fuel Leak Questions

Water Pump Leak,

Yesterday I decided to run the engine a bit to charge the batteries.  After 
running about thirty minutes, I went below to close the thruhull and saw 
water coming from under the front engine cover.  Source is the cooling water 
pump.  Hoses are tight.  I couldn’t tell exactly where it is coming from, 
however.  We have had a long spell of cold weather (in/for eastern NC) and I 
keep a heater in the cabin that comes on at 38 degrees.  We occasionally 
loose power and the power company did a 4 hour shutdown last week, so I’m 
not sure whether the pump froze.  The leak is relatively slow, so I suspect 
that shaft seal at front or the gasket at the back of the pump has failed. 
It is my understanding that several pumps may have been used on the engines 
(3GM30F, Hull 694).  How do I determine which pump I have?  Have others had 
similar failure and what did you do to fix it (new pump, complete rebuild 
kit, or just gaskets and impeller)?

Fuel Oil Leak,

At the same time that I was checking the water leak, I noticed that the pan 
under the engine had some fuel oil in it.  Again, I haven’t been able to 
spot the exact source, but it is coming from around the engine fuel filter. 
The filter seems intact but the lines above it are wet with fuel.  Have 
others had a similar problem and where is likely source and what is the 
recommended repair?

On both of these, I was limited in the time that I could spend investigating 
the problem sources and will go back to boat at first opportunity to try to 
zero in a bit better, but I would be interested in your thoughts to aid in 
the process.

Thanks,

Dennis Harris C320 #694