I have a 90ETLJ 90hp 1986 Yamaha. Motor would run 5 minutes and temp buzzer would come on. Got home checked to see if t-stat was good found out it didn't have one. Then checked spark plugs and found water in bottom piston. Took cylinder head off to check gasket but can't find if water came in thru there. Is there anywhere the water can be coming from or is there a way i can tell by looking at gasket?
