Exhaust Flappers

Hey- thier mistakes keep my hobbies floating- regarding flappers- thank god noone has a 1996 and later gm- shut her down from idle 99% chance you will have water in the engine. Designe flaw on the vortech 64cc head. valves over lap=intake/exhaust very briefly open at the same time. Helps with performance and economy- But sucks-literally!!I have rebuilt countless engines due to that flaw- better riser design would fix the problem. a quick low rev prior to ignition kill also can save alot of them too. The exhaust force the water thru the turn down, thus less chance of injestion. They are not dumb customers- Just NO common sense I wont share anymore laughs with you guys=k

Joe you kill me LOL...i like your dumb clients stories!!!
I run my boat with out them quite a long time..then I decided to put it again...just as it came from the factory it have to be a good reason...But in boats with the invertaflow I think its very rare that the water could make up that way when going reverse or launchind the boat. The muffler sits very high....

I did replace them. My luck would be that I'd sink have an engine malfunction. For $40, it's a piece of mind. There had to have been a reason Correct Craft Inc. installed them, right?

Ken

What is the sound change on vs. off?

Sam

Mine have become kind of deformed over time. How do you say they are attached? Glued? I think mine have hose clamps on them, but that could just be on the exhaust where it comes thru the hull.

That was a good one Alan and now you have Ken thinking "OH NO"...hehe

To much wine....

I've had two boats with them on. Took them both off, never had a problem.
I think it sounds better. I always back into the water slowly when launching!
Good idea on the critters tho. Maybe I'll use them for storage. JIC.

Yes, mine are the standard rubber type. It seems like they need to be replaced every 3-4 years, which isn't bad.

Thanks for the feedback. It makes sense that it may prevent water from being sucked through. I thought it was more for noise damping.

Ken

Ken, I wouldn't think you need them with the type of manifolds that you have. However, many people have them including me. Are yours the ordinary rubber type, but are glued inside the plastic exhaust flange?   

One of my rubbers broke off my exhaust pipe today. I just spend $40 for two new ones. Are they even necessary? The classic Correct Crafts don't have them. I assume it's a noise control device?

Ken