Paint stripper (Aircraft – Klean Strip – Super Strip – ect.) can help in removing gasket material without damaging the sealing surface. Tubs
Paint stripper works for the most stubborn remains of the old gasket. For the mechanical removal a plastic razor blade scraper followed by a brass brush with WD-40. All remains of the old gasket and sealant need to be removed. Staining is normal and ok.
I also use OMC Triple Guard grease on the base gasket and mating surfaces. This works as long as the surfaces are smooth and clean. The next time you pull the powerhead for servicing, it will separate nice and easy plus you can reuse what has become a very expensive gasket for the 1954 and 1955 OMC motors.
Improvise-Adapt-Overcome
