Merc 4.3 L bogging down

[richardson61]

have a Merc 4.3L have replace ignition module, coil, sensor, cap, wires, plugs, rebuilt carb. starts and idles fine but after running for 30 mins or so will not starts running bad and rpm's won't go over 3000.

 

[180shabah]

Re: Merc 4.3 L bogging down

start looking for fuel line and vent restrictions.