1978 johnson seahorse-4 hp air cooled motor overheats and runs rough and wants to stall. i take off motor cover and it runs fine. i was told the cause was not enough oil in fuel mix. can anyone advise of correct mix? also, what is correct mix for 1983 johnson 7.5 hp?
last time it ran it suddenly started to run sluggish. i shut it off to fish for a few hours and it never started again. i rebuilt the carb, because it didn't seem to be getting fuel. i noticed it seemed to have no compression when pulling starter rope. i removed head to inspect. pistons looked...
