working on the motor in the title. The powerhead base gasket leaked exhaust when I got it, so I replaced it. New gasket lets exhaust out as well. Should there be sealer on the gasket? The leak seems to be on the side facing the pan, not the block.
Freshwater. Mating surfaces were clean with no apparent damage. I prepped it with some light 1000 or so grit to clean and remove any of the old gasket.