[C320-list] Aqualift Muffler Leak

[Michael Paris]

I removed the muffler and do not see any obvious cracks. With it on the dock, i put some water in it and pressurized as best I could but still no obvious leak. The leak when it was on the boat was fairly slow. My guess is that it may be the screw holes that others have experienced. It definitely wasn’t the hose. Any suggestions welcome. 

Thanks,
Mike P.
#734

> On Sep 12, 2023, at 1:46 PM, <john at frostnet.net> <john at frostnet.net> wrote:
> 
> We had this several years ago and chose to get a new muffler from Catalina.
> It turns out almost every 320 has a slightly different design. They require a large number of very exact dimensions from your existing muffler and even preferred that you send them your old muffler so they can duplicate it.
> The new muffler works fine. Because it appeared to me that the old muffler failed from vibration, I mounted the new one on a thick rubber pad and held it down with a nylon strap rather than screwing it to the hull.
> 
> I know that others have patched the leak externally with epoxy/fiberglass and some others have just bought a different brand of muffler. Those approaches seem to work also
> 
> Rather than throwing away the old muffler, I dried it out completely, closed off one connection and sprayed inside heavily with the rubberized leak stopped spray sold to seal gutters and other such applications.
> I haven't use that, but I bet it would've worked too
> 
> 
> John
> 2007 C320MKII
> Hull  #1118
> Lake Guntersville, AL
> 
> 
> 
> -----Original Message-----
> From: C320-list <c320-list-bounces at lists.catalina320.com> On Behalf Of Michael Paris via C320-list
> Sent: Tuesday, September 12, 2023 2:23 PM
> To: C320-List at Catalina320.com
> Cc: Michael Paris <mparis495 at gmail.com>
> Subject: [C320-list] Aqualift Muffler Leak
> 
> My C320 has developed a slow leak from underneath the Aqualift muffler. My muffler is the exact dimensions of one shown on CatalinaDirect but they don’t sell them any more. I just sent an email to the Catalina Yachts parts department. I realize that this is a common repair/replacement item. Have any of you dealt with this recently? Also, I have a week long cruise planned for a couple weeks from now. Is it okay to use the boat with this leak?
> 
> Thanks to all,
> Mike P.
> #734 Mojo
> Southern California
>