savageguy25

o gpt a os 4 stroke .40 on the back of the motor inside the capthat fills inbehind the crank theres a nipple sticking out i know its fuel related but whats it used for exactly?

masonman

Is it a fuel pump? or blowby vent?

savageguy25

its not a pump cus theres no inlet

alan0899

G'day Mate,
It's the crankcase vent, lots of oil should come out of it, small piece of fuel tube to outside the plane does the trick.

savageguy25

thanks alot man