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Old 05-05-2016, 02:39 PM   #1
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Manatee Exhaust Flapper

All that was left of the original flapper was the hinge welded to the top of the pipe. I fabricated a new flapper from a s/s strap hinge and a s/s disc for the flapper I ordered from EBay. I started this project over the Winter after talking to a mechanic that had worked on a water flooded engine with a similar exhaust as the manatee. If you attempt this fix make sure you grind off all the weld that was used to attach the hinge as it is very difficult to drill, I used tungsten tipped drill bits.
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Old 05-05-2016, 02:42 PM   #2
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Exhaust flapper installed.
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Old 05-05-2016, 06:56 PM   #3
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so i take it that the flapper stays open on the bottom just a bit ? i want to do this to my manatee and thank you for the idea.
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Old 05-05-2016, 07:44 PM   #4
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My exhaust pipe is cut on a slight angle so the flapper closes. The top leaves about a 1/2" to drill the hinge screw holes the bottom protrudes about 1".
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Old 05-09-2016, 01:49 PM   #5
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Great job. Looks fantastic.
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