1997 Mercruiser 3.0LX engine. Manual Fuel Pump, carburetor.
Boat ran great last time out. I pumped about 1/2 tank of new gas (10 Gal) got to the lake and would barely run, stalled off throttle or shook like crazy trying to stall.
Old boat I thought tune up ignition:
Replaced plugs, wires, cap...