mawyatt
New Member
We have the Merc 8.1L and the cool fuel module raw water plug snapped off. This is the blue plastic plug used for draining water when winterizing. I checked the other engine and the plug was stuck and snapped off too. It seems the plug with o-ring was placed on the cool rule module before the module paint was dry, this caused the o-ring to not seat properly and allow salt water to weep out over the years. When I looked closely I noted the o-ring was stuck to the module wall like it was glued in!! So I have to replace the plug and o-rings or maybe just a brass plug.
I was thinking of drilling out the remaining plastic from the plug and using a tap to extract the remaining plastic left after the drilling. Anyone know the thread size I would need for the tap? Also where to get the replacement plastic plugs and o-rings if I decide to just replace them instead of the brass plug?
Thanks,
Mike
I was thinking of drilling out the remaining plastic from the plug and using a tap to extract the remaining plastic left after the drilling. Anyone know the thread size I would need for the tap? Also where to get the replacement plastic plugs and o-rings if I decide to just replace them instead of the brass plug?
Thanks,
Mike