I have a 1965 Evunrude 75hp engine taht starts and runs good. After running arround the lake several hours stopping and fishing several times we tried to start the engine and it would not fire. The engine cranked over great had good spark at the plugs has plenty of gas at the carbs but no sign of fuel at the plugs.I tried the automatic choke the manual choke held my hand over the carbs with no throtle full throtle and everything in between. Ieven puored fuel into the carbs still no sign fuel at the plugs. I have done a compression test cold and all cyls are arround 90 psi (seems low to me). After about a half hour of trying to start the engine and battery was starting dye it finaly fired idled accelerated and seemed to run great.After getting it back on the trailer i shut it off and tried to restart but it would nut fire? Any ideas? 