[C320-list] muffler

[danny jensen]

Sorry to hear about your problem.

I did some research on this subject and found it was risky to use non factory mufflers because of the potential for back flow of water into the engine. Some people have had this problem when using other mufflers. It seemed that the mufflers break in the corners near the screw holes. Vibration may be the cause. Specifically exhaust hose vibration could be a cause of the failure. The secondary cause of vibration may be the glass  on glass mounting. You may want to consider looking at rubber mats and industrial machines use to dampen vibration. I considered this but did not implement this on my boat. However, I did use a hump hose. It seemed like the consensus was to replace your muffler every 10 years to be safe.  

I did a preventive muffler replacement a few months ago. The full article is here and I included some text below from the article.

https://groups.google.com/forum/?hl=en&fromgroups#!topic/c320-list/nl-h95HWovo

Some owners felt that a hump hose would isolate the vibration from the engine to the muffler.  The existing wet exhaust hose connecting mixing elbow to muffler input was a 22 inch 2 in. id.  I decided replace with 2 hose segments of more flexible trident corrugated exhaust hose joined together with an exhaust hump hose I purchased from Catalina Direct. 

I used this hump hose:
http://www.catalinadirect.com/index.cfm?fuseaction=product.display&product_ID=1023

Exhaust Hump Hose 1-5/8"I.D X 6" (#Z2152): 1 
Item Total: $31.49 

I do still have my non-leaking old muffler but I don't think it will fit your boat. 

Where is the leak and how long has it been since replacement?

Danny
#972


-----Original Message-----
From: c320-list-bounces at lists.catalina320.com [mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of pat reynolds
Sent: Wednesday, June 27, 2012 7:18 AM
To: c320-list at catalina320.com
Subject: [C320-list] muffler

I am on my second catalina muffler and it has developed a leak.  Has anyone replaced the muffler with a metal one?  I have a 1995 model #249