[C38] Exhaust system check valve

[Tom T.]

My exhaust check valve was located at the highest point of the rubber exhaust hose in the sail locker under the main winch on the port side where the hose is horizontal.  I have seen other Catalina 38's with this check valve and I suspect it was original from the factory.  Like Phil, I had to replace mine also but I never experienced the noise he describes.

Tom Troncalli


----- Original Message ----- 
From: Steve Smolinske 
To: Catalina 38 Listserve
Sent: 3/2/2010 11:11:09 AM 
Subject: Re: [C38] Exhaust system check valve


my thoughts exactly Max




From: listserve-bounces at catalina38.org [mailto:listserve-bounces at catalina38.org] On Behalf Of Max Soto
Sent: Tuesday, March 02, 2010 6:50 AM
To: tdtron at earthlink.net; Catalina 38 Listserve
Subject: Re: [C38] Exhaust system check valve


Exhaust Check valve??? Is this a Yanmar only set up??
Were is this located??  
Regards,


Max

2010/3/2 Tom T. <tdtron at earthlink.net>

Hi Phil,

Is your new check valve hung level in a "normally closed" position with the hinge at the top requiring the exhaust to open it?

Tom Troncalli


----- Original Message ----- 
From: Phil Gay 
To: Catalina 38 Listserve
Sent: 3/1/2010 11:46:21 PM 
Subject: [C38] Exhaust system check valve


Dear List,

I finally finished my exhaust system upgrade on my Yanmar 3GM30 from 1 5/8” to 2.”  I replaced the check valve downstream from the water lift muffler.  The flapper in the old valve was lying at the bottom of the valve unattached to anything.  I like the more relaxed sound of my exhaust now.

However, the new 2” check valve clanks when the engine is running.  I suspect that the bronze flapper is banging against the upper surface of the check valve rather than the surface that it closes against.  I suppose that I could put a drop of sealant on the downside surface of the flapper to deaden the noise.  Has anyone else encounter this annoying clanking?  How did you solve it?

Phil Gay
C38 049 Que Linda
Everett, WA

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-- 
Max Soto
C38 #198 ESTANCIA
Puntarenas, Costa Rica

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