exhaust flapper issue

[turbocorrado]

i found 2 exhaust flaps in my outdrive. while looking them up to order new ones, i ran into an issue identifying which ones im supposed to have.

its a 97 wellcraft with a 4.3 mercury
i was told the engine was replaced in 05, but the flame arrestor on the engine says it was manufactured in july 2006, it appears to be a throttle body injection engine, and it also appears to have risers on the exhaust manifolds.

 

[tpenfield]

The exhaust flappers are going to be in the Y pipe, so may not have changed with an engine swap-out. See if you can get a serial number off the engine (ID plate above the starter) and go from there. You should be able to isolate the correct exhaust flapper from the various parts lookup web sites.