2.3 litre exhaust flapper

88 Capri

Petty Officer 2nd Class
Joined
Aug 25, 2019
Messages
193
I was doing some reading and noticed that I should have one of these. I brought the exhaust pipe to the bench and noticed all that is there is the shaft.
My questions are what purpose does it serve, do I need it and how would the engine run without one.
I'm curious on my last question because I had trouble getting the engine to idle below 900 rpm and was thinking it might be something with backpressure. This is my first inboard boat so please excuse my noobness 😊
Thanks,
Jim
 

Scott Danforth

Grumpy old guy who plays with boats
Joined
Jul 23, 2011
Messages
33,432
it is there to prevent hydro-locking should your motor ever run-on (common problem) or you back up quickly
 
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