National Aeronca Association Bulletin Board

I am doing a top O/H on my a-65 c a-75. I plan on replacing two of the cylinders. The other two were replaced 100 hours ago or so. They are p015. The pistons are stamped 4597 which I think are piston P/N 40577. Do you guys know which piston rings I need? Does anyone sell sets of them?
At minimum I’ll need two cylinders and four sets of rings, if it’s available I’d be interested in two pistons as well.

Thanks for the help!

Fresno Air Parts should have the A-75 parts you need. The 40577 pistons used in the A-75 have 3 rings and a small piston pin diameter, .859. The ring set will be the same. A-75 cylinders are different than A-65 by the use of Stellite components in the valve gear. Connecting rods are different by the use of the larger pin bushing to accommodate the smaller pin and are drilled for lubrication of the opposite cylinder at BDC.

Paul

Thanks! I ordered a bunch of stuff from Fresno Air Parts today. They have exactly what I needed.

Jessica,

They are a great bunch to work with, knowledgeable on their products. They have many more part than they advertise.

Paul