Sorry to resurrect this old thread.
I'm rebuilding an older 024 (serial #11071460) that has the single ring piston. Surprised me when I saw it had only a single ring. I ordered a replacement two ring piston kit (didnt' see any single ring pistons still available?). I've lurked here for a while now with other projects gleening info and I've read about every 1-2ring thread out there but I'm wondering this:
Install the 2 ring piston with one or both rings?
Any recommendations?
fwiw, my McCulloch 325 has a three ring piston in it, as did the old Sears David Bradley chainsaw I had a while back (iirc).