On Jul 21, 8:00*pm, Larry W wrote:
I'm going to look at a Mercrusier 3.0 (4 cyl) tomorrow that has a carb that is
losing the float bowl fuel when the engine is shut down. This usually meant
replacing the carb with cars I've worked on in the past but a rebuilt is $400
and may not be easy to get.

Has anyone had any luck repairing this problem - trying to reseal casting plugs
etc.?

Thanks for any help
Larry

I've read that a leaking, or poor Needle Valve can cause a carb to
drop its fuel when sitting. The same culprit can also cause " loading
' or over supply of fuel when idling.
Casting Plugs usually come with a re-build kit. I am talking about
Walsh Plug caps.