just curious if anyone might know....my father accuired what appears to be an older model asp 1.08 2 stroke engine. but we are wondering. in the middle of the back plate on the back of the motor there is a nipple attached that looks just like a fuel nipple or exhaust nipple. we have never seen amotor that has this. and we are wondering if anyone might be able to tell us what it is for. we are thinking it might be some sort of vent for the crankcase like some 4 strokes have be we are unsure.