dean campbell

Does anyone manufacture a bushing to adapt a 4.5" clamp-on muffler to a 4" exhaust system?

I know it's not the correct way to do it, but it would get me on the water for now.
thanks,
dean

tcelano

I haven't seen an manufactured adapter, but if you need to get on the water ASAP, get a piece of 4" Trident Marine Exhaust hose from Defender Industries. The outside diameter of that hose is 4.5". You can clamp your muffler on over it, or get a piece of 4.5" ID hose to bridge the gap, depending on the configuration. That will work at least until you find or have an adapter made.

I know this because my boat had 4.5" transom holes. I made my own 4" pipes, and welded in some inline mufflers. I put the hose on over the exhaust tip on the inboard side, and it all press fit in there perfectly with some 5200 just so I wouldn't be tempted to take it apart... Mine have flanges that bolt to plates on the transom from the outside.

PatriYacht

I did it with a piece of 4" i.d .25 wall aluminum tubing. Cut a piece in half so that it clamps on the exhaust pipe as you tighten the muffler.

dean campbell

thanks guys, i'll try one of these ideas, also you gave me some other ideas that may work too.
yeah, just looking for a temp. fix untill i get some permanent mufflers.
Thanks!
dean