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View Full Version : Mercruiser Y Pipe Flappers



RickR
04-28-2004, 07:32 PM
While doing a drive service I found a flapper in the bottom of the Y pipe. Found the other 3/4ths the way down on the other side.

I am sure they were restricting the exhaust flow.

I made a hinge out of a 3" x 1/4" bolt. Ground the end down to fit in the previous hole and made a plastic bushing for the threaded end.