Exhaust Flapper a Valve

[jhnewsome17]

On my 1987 Catalina 34 there is, according to the manual, a "Flapper Valve" on the exhaust hose at the through hull fitting. The purpose of the valve is to "prevent surging up the exhaust line in a following sea." My question is whether or not this flapper valve is prone to malfunctioning therefore not allowing exhaust gases/water discharge from the engine/water muffler. I look forward to the comments.

 

[Stu Jackson]

The manual is wrong, it was incorrectly copied from a C30 manual. Your exhaust goes straight down, look in your lazarette.

Please join us here, too:

http://c34.org/bbs/index.php/board,11.0.html

Lots of C34-specific information.

 

[jhnewsome17]

Stu, thanks much for that info. I have looked in the Lazarette and could not see anything but the hose and through hull, but assumed there must be something inside the through hull I could not see. FYI, I have hull 299. Bought her about a year ago and still learning the systems.

 

[Stu Jackson]

Bought her about a year ago and still learning the systems.

Nice, we have a vintage boat, too. Best place to learn is at the link I provided. This site is helpful, too, great folks here.

 

[jhnewsome17]

C34ia

Nice, we have a vintage boat, too. Best place to learn is at the link I provided. This site is helpful, too, great folks here.

Stu,
I have already sourced the C34IA web site for info. I need to join and register my boat. Can I do this all online?
James

 

[Claygr]

Here's the link to join the C34 International Association:

http://www.c34.org/join.html

 

[Stu Jackson]

Stu,
I have already sourced the C34IA web site for info. I need to join and register my boat. Can I do this all online?
James

Yes, you can pay with PayPal, or snail mail. Your boat, your choice.

We look forward to your membership, thanks.

 

[MitchMan406]

Here is the exhaust thru hull sold by Catalina now:

http://www.catalinadirect.com/index.cfm/product/18_474/exhaust-flap-assembly.cfm

I installed this on my C36 and it works fine. No known issues. And it may help in a following sea situation. It has rusted a little. Probably need to check the fitting where it mates to the hose for crevice corrosion. Its probably oxygen starved there.

 

[Stu Jackson]

Unnecessary on a C34, don't know about a C36. On the C34 the exhaust hose goes from the bottom turn underneath the transom all the way up into the port locker then forward and down to the muffler under the head sink. It's 17 feet long! Having something with a moving part in an relatively inaccessable part of the boat makes no sense to me.