Hey Guys, the mechanic hooked up the fuel pump backwards on my 1980 75hp evinrude. Meaning the gas line was ru nning into the engine block and the vac(air) line to the carbs. Yes, I'm pissed. My question is : What damage has been done ? I did replace the fuel pump. Motor wont take gas but will rev if you hit the choke. I see white milky residue in prop exhaust. Any input appreciated !