sandmanmike1
New member
I recently did a Mikuni Carb conversion on my son's 78 ET-250 so now I am running a Mikuni fuel pump also. I noticed today it is slowly sucking oil from crankcase toward fuel pump. What does this mean? Do I drain crank case or is this somewhat normal. Cannot find any info on this. Machine was not running when i got it.
that line is too light. the vaccume of the motor is collapsing it as the motor runs. you need to use automotive fuel line with a 50psi rating. this will not colloapse.
sandmanmike1
New member
Would a much longer vacumn line cause this?