I have a 1979 175 v6 mariner. It blew the gasket out the side of the reed block just under the top set of carbs. The Motor has alwayas sneezed on start up. Is the gasket the cause or the result, or is there something else I should check while I am in there changing the gasket? The motor was running fine in some rough water and then is stalled when I slowed down and didn't want to stay running. When I got it home I saw the bulging gasket and felt the air blowing out.