but now without all that excess gas to cool things down, it is a lot warmer in the bay with it running.
The heat is coming from the exhaust pipes or header, since it is finally running correct instead of being loaded down with all the excess gas. It is air cooled so no radiator. And i never said i was going to use 50 weight oil - did you read the thread? The engine is in very good shape and i would like to keep it that way. Syn oil will lower the temp of the engine and i thought that could be a benefit.
I am thinking 15w-50 for the summer and a lighter weight if i am going to operate it in way cooler temps.