Broken Exhaust Dam Flapper
 

Guys,

Getting ready to pull my engine again to replace the circ pump (can’t get to it; don’t ask), and discovered this:

https://cimg6.ibsrv.net/gimg/www.off...981a4229c.jpeg

Are these replaceable? Totally necessary? Got any ideas?

Thanks. Brad.

Yes, very necessary. They prevent reversion. Or at least helps prevent it. They are replaceable. Or, you can remove them and install rubber flappers on the exhaust tips.

Pasquesi,

Reached out to Corsa. Got a reply back with PN. Looks to be a welding job. Sound about right? Or can they be replaced without removing the shaft?

Thanks. Brad.

I don't think I have ever heard of flappers helping prevent reversion. Exhaust water and "vacuum" will be occurring before hitting the flappers?

Ryan,

I think he meant wave surge.

It looks like I’ll be pulling the exhaust tips while the engine’s out, too. The shaft is tack welded in, so I’ll have to grind the weld out, slip the shaft out, replace with new assembly, then tack weld the new shaft in place.

I spoke with Neil Wallace, and he tells me the exhaust tips shouldn’t be stuck to bad; no 5200 or anything major, as far as adhesive goes.

Yet AnOtHeR winter project to add to the list.

I know. It’s spelled B. O. A. T.

Thanks. Brad.

Water intrusion from stopping quick, waves up the transom, etc, etc.

May help dampen the exhaustbpulses / lessen some reversion by closing on neg pulsing, etc, but not really a reversion (from engine design while running) device.

They are lifetime warranty from Corsa, I have sent tips to them before and they replaced them no charge

BoatNT,

I saw that. I’ll call them and see what they say.

Thanks. Brad.

I like the external Salisbury flappers, inexpensive and they’re visible so you can see if they start to tear/deteriorate.
https://cimg1.ibsrv.net/gimg/www.off...43c737087.jpeg

BoatNT,

Great news. Corsa told me to send them back to them and they'd replace them.

Thanks. Brad.