well i would assume that there is a new needle /seat assy and float in the carb after rebuild.
first i would make sure there is not any crap on the needle an seat.
then check the float for proper level adjustment.
if they test OK ..then you may need to get a fuel pressure gauge and put in the line before the carb an get a reading on how many PSI the fuel pump is putting out, anything over 7 lb. is gonna be a prob.
Napa and pretty much any parts shop will have a fuel pressure regulator set at 7lb.
BUT being ME I would bet $ on dirt in the needle seat assy. or a bad/not set to right hieght float.
not the fuel pump.
Tim
P.S. get that contaminated oil outta the motor A.S.A.P. ...before proceeding further soos ya dont spin a bearing in the lower end.
