Fuel pump DF140

[Buckshot]

2002 df140. 1300hrs my oil level is rising. So l am trying to verify i have fuel leaking into the crank case. Assuming it is gas, is it just the o-ring or would it be the pump? Any way to test which is bad.?

[kurttruk]

I havnt looked into the problem but orings are cheap and i'm sure it would tell you wether its the oring or the pump when you go to changes it(the o-ring).

[mitch]

check low pressure fuel pump

[nelbur]

I believe it could also be from a problem with the needle/seat/float in the vapor eliminator device, because the vapor is fed into the crankcase. If you apply too much pressure, say if you had another low pressure pump in line with the one on the engine, you could overpower the float. You might even do this with the bulb, but that seems unlikely.