I was cutting down some cholla ( large woody cactus you don't want to touch) when I noticed my muffler was on the ground in pieces. Turned the saw off and looked in the port. The piston is scraped and gouged but the cylinder looks ok. Is the piston below the ring supposed to rotate back and forth about 1/16"? The rotation is perpendicular to the pistons running movement. The engine must suck air in through the muffler port. Guess a muffler does more than quiet an engine. Anyone have a piston for a Poulan 2300 38cc pruning saw? This saw was fine for light pruning and messy cactus duties. Cholla really make a mess out of a saw and I don't want to do that to my 50cc saws.Thanks guys