Exhaust Flappers
 

I bought my boat last year, and I was under the impression that it contained internal exhaust flappers. When I recently had the boat out of the water, I put my arm up in the exhaust and could not feel any type of internal flapper. What advice do you have for me in regards to either installing a flapper or some kind of protective device coming off of the headers? I want to stay away from changing the tips, as I like the tips that are currently on there. Any suggestions?

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I know you can send your tips to CP performance marine and tyey will install the stainless steel and rubber "no burn" flappers into those tips. You can also purchase them and do it yourself (requires drilling and welding)

you really want to have them... when you sit on the beach and a wave comes crashing in to the stern of your boat you may run the risk of it getting all the way into the exhaust manifold or header and getting through a open exhaust valve. then causing a hydro-lock situation. which is never fun. i run the straight cut tips with internal and external flappers. also when you have good working flappers and someting unexpected happens (like a stall or something happens making the engine die) your wake can come crashing into the transom. and again when you attempt to re-start, you may hydro-lock

The boat is kept on a freshwater lake, and I don't really ever have to deal with waves crashing against the back, as there isn't any beach at this lake. Considering that I do not own a trailer, I am pretty limited as to how much work I can do on the back of the boat. The boat stays on a lift the entire time. Is there anything that can be done without replacing or removing the tips?

Yep, leave the boat in the lift. If you are not willing to do this I would put flaps on the tips . But it is your money and you asked.

Your going to have to do something internal because you can't put flaps on those angle tips.

You could cut the tips off straight and put clamp on flappers like these.

http://www.overtons.com/modperl/prod...ID=1008&r=view

It probably did have them. Cheap flappers burn out. That is not uncommon. Put some of those expensive flappers in those tips and be done with it.

Any of the welded style flappers will be noisy and most likely blowout at some point in the future which will then require you to once again remove your tip(s) and send them out for repair again.

Been down that road one too many times. We got fed up with the sub-standard flappers in the market, so we deveoped a new flapper system that slides in and out from the outside of the boat. Your exhaust tips don't fail, so you shouldn't have to remove them. Not mentioning that taking your tips out is a major pain in the a--.

Here's a link to the Dana Mrine flapper carriages,
http://www.danamarineproducts.com/Pr...7-36d57495cc7b

These are avaialable for both angle cut and straight cut tips. This is truly the first silent operation stainless flapper. It features proper rubber molding the fit the exhaust tubing, and a bump stop to prevent over-opening. Over 2500 units sold, not one complaint or failure.

The nice thing is, if one were to fail, remove two small side bolts, pull the carriage out, push the pin out, install new flapper, slide back into tip, re-bolt, literally a 5 minute fix (without removing the tips!)

Oh-yeah, they carry a lifetime warranty, the only warranty claim I will not backup are overheated parts and melted rubber. Other than that, you'll never pay for replacement parts. After 2500 units sold, and two years in the market we haven't bought a customer a new flapper yet.