I've got 1 3/4" Su's fitted. Before the winter layup I was getting an infrequent flooding of the rear carb. Since its been back on the road after winter its much worse. It can happen at tickover but its more likely after a bit of revving.
I've got the float at the right height. The needle and valve are tested and sound. Its as if the float sometimes gets overwhelmed by the amount of fuel fed into the rear carb float bowl. Two thoughts:-
1)The mechanical fuel pump is bad. The in / out valves in the pump are supposed to give a constant fuel feed no matter what the engine speed (according to the works manual). I wonder if the ethanol has got to them and made them go bad
2)The fuel return rail/pipe is blocked and therefore putting extra fuel pressure on the rear carb.. Is this realistic ?
Any thoughts would be welcome
I've got the float at the right height. The needle and valve are tested and sound. Its as if the float sometimes gets overwhelmed by the amount of fuel fed into the rear carb float bowl. Two thoughts:-
1)The mechanical fuel pump is bad. The in / out valves in the pump are supposed to give a constant fuel feed no matter what the engine speed (according to the works manual). I wonder if the ethanol has got to them and made them go bad
2)The fuel return rail/pipe is blocked and therefore putting extra fuel pressure on the rear carb.. Is this realistic ?
Any thoughts would be welcome