Mercruiser 3.0 runs fine for a bit, then dies and won't restart for a while

Jsattely

Recruit
Joined
Jun 4, 2022
Messages
1
Hello,

New to this forum. I have a 1995 mercruiser 3.0. fires up fine will run for 15 to 30 minutes great then sputters and shuts down. Takes 15 to 30 minutes to start up again. Boat has new wiring, rebuilt carburetor, starter motor and new ignition coil. We noticed that it craps out much quicker when it's hot out. Also noticed if we open the engine cover when it starts to get bogged down it will recover a bit.

Thoughts?
Josh
 

dubs283

Vice Admiral
Joined
Jul 27, 2005
Messages
5,343
Check contents of/replace fuel fliter(s). You mentioned new coil, what about plugs, wires, cap/rotor, check/set timing and idle?

Obviously heat related so first inclination would be fuel supply. Inspect from tank to carb. Fuel pressure and vacuum, vent line, supply line, filters, fittings, anti siphon, etc....
 
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