Engine is a 1960 40 hp Johnson, posted a couple times now. Newbie so I can use all the help I can get.
Could a missing thermostat make the top cylinder run hotter, or even over heat, while the lower looks ok?
Had an overheating prob so checked the thermostat, found there wasn't one. Ordered one. Changed the impellor already so thought I'ld make sure there wasn't a blockage internally so pulled the head cover off. No blockage that I could find, blew everything out w/ compressed air. One piston is wet w/ oil (lower) top is is crusty/dry.
What could cause this?
BTW, rebuilt carb, changed points, condensers, coils and plug wires already. Seems like running into one prob after another with this motor. Guess I'm learning a lot though.
Could a missing thermostat make the top cylinder run hotter, or even over heat, while the lower looks ok?
Had an overheating prob so checked the thermostat, found there wasn't one. Ordered one. Changed the impellor already so thought I'ld make sure there wasn't a blockage internally so pulled the head cover off. No blockage that I could find, blew everything out w/ compressed air. One piston is wet w/ oil (lower) top is is crusty/dry.
What could cause this?
BTW, rebuilt carb, changed points, condensers, coils and plug wires already. Seems like running into one prob after another with this motor. Guess I'm learning a lot though.