CN24

Are intake manifold gaskets for a marine engine any different than automotive gaskets?

Griff

No. Just use some good Felpro gaskets.

BadDog

See if you can get a look at an HP 500 intake gasket. It is made of the same type of material that the Merc exhaust gaskets are. Pretty tough material.

GPM

You might want to take a look at the Cometic gaskets.