Iv got a 1983 Evinrude 4.5 hp I'm having issues with it over heating iv replaced impeller and checked the water pump hose for debris and replaced base gasket and head gasket to check for scores in cyclinders bought motor to fix up comp 90 -80 cycl mint sea foamed it thought stuck ring nope the head got so hot I assume cuz the coils have melted on the head mount changed all that an still runs hot going to take motor off again when it cools down any thoughts tho ? .