Finally replacing the crankcase breather tubing in my IO 540 powered Skybolt has a 1 inch aluminum tubing part way then has some sort of clear tubing to under pilots seat and then reduced to 3/4 inch clear tubing to tail. I have been researching required breather tubing size can’t find much. Looking for input on what size tubing everyone is using. I will run aluminum tubing from firewall to tail
Jeff
Jeff
