[C320-list] 1995 C320 Aqua Lift Muffler & Elbow

[amshd2 at aol.com]

PAT

Where did you get your new one.

Tony 



-----Original Message-----
From: Pat Moriarty <patm at psiurethanes.com>
To: C320-List at Catalina320.com
Sent: Thu, Dec 3, 2009 8:28 am
Subject: Re: [C320-list] 1995 C320 Aqua Lift Muffler & Elbow


I did basically the same thing on 1994 boat. I think the bottom flexed too much with exhaust pressure and caused the seam failure. Repaired several times and finally got a new one. 
 
Pat #130 
 
At 09:12 PM 12/2/2009, you wrote: 
>Rollie: 
> 
>The muffler was designed to be held down on only three corners. I would 
>not suggest your modifying it! Our 1994, #150 started leaking at the 
>bottom seam about 6 years ago. I had it repaired twice by a fiberglass 
>shop and I did a repair once myself. I think part of the problem is that 
>vibration between the engine and the fixed muffler is what caused the 
>seperations. I think by your tightening the screws, you might be adding 
>to the problem. On the replacement muffler, I did not attach it to the 
>platform it sits on. The two hoses attached to it hold it in place. I 
>placed a thin foam pad underneath the muffler to avoid abrasion/chaffing 
>of the muffler or platform. 
> 
>The hose you describe with the 3" bulb in it I think is designed to 
>absorbe some of the vibrations. I had looked at them when I made the 
>replacement, but decided to leave the muffler "float" to avoid putting 
>stress on the muffler. I believe it was referred to as a Hump Hose. 
> 
>Dave Gleason 
>Proud Mary, #150 
> 
> 
>On Wed, 2 Dec 2009 22:47:58 +0000 (UTC) argates2nd at comcast.net writes: 
> > 
> > Our 1995 model #182 has only 3 screws holding down the aqua lift 
> > muffler? The aft port corner has no hole and no screw. Is that 
> > normal? 
> > 
> > Should I try to add a screw to that corner by drilling a hole and 
> > self threading with the screw? 
> > 
> > I may have some leaking from that corner, although the other 3 
> > screws were not very tight and I tightened them today but did not 
> > run the engine afterwards. 
> > 
> > 
> > Our Perkins does not seem to have an exhaust elbow like those 
> > described in recent e-mails? The closest thing to it is a 9 inch 
> > pipe with a 3" bulb in the center where a 60 degree downward curve 
> > exists coming off the aft end of the engine, labeled "exhaust 
> > outlet" in the Perkins manual, which clamps to the reinforced hose 
> > before the muffler. 
> > 
> > Is that the elbow that should be removed from the back of the engine 
> > and checked for carbon build up & deterioration? 
> > 
> > Our Perkins engine has 570 hours. 
> > 
> > Thanks, Rollie Punta Gorda, FL 
> > 
> 
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Pat Moriarty 
PSI Urethanes Inc 
PH: 800-888-5156 Fax: 512-837-8733 
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