Reply To: Anodes on Evinrude 18 hp 1960

[Mumbles]

I wouldn’t use anti-seize of any kind on a powerhead as it usually gets all over everything and isn’t really neccesary. Once I used aluminum bases ant-seize on a Chrysler 55  I had years ago and it caused more problems than it solved.  After using the motor in the salt, there was some kind of reaction and the bolts holding the gearcase on were harder to remove than they were originally.  Lesson learned.

For sealing the crankcase halves, I like to use Permatex Anaerobic Flange Sealer or Gasket Maker. Both surfaces need to be super clean and it only sets up once the pieces are bolted together. There is a copper based primer which can be also used with it to to help it set up. Others prefer the old school 3M 847 but it might contain fillers and is harder to work with as it is like wet and runny snot.  The parts also have to be assembled immiediately after applying before it skins over. With anaerobic sealers, you can go and have lunch after applying it and then assemble the parts when you come back.