I am trying to rebuild a Husqvarna 42 Special. During tear down, the saw appeared to be very clean suggesting that it was lightly used. It has an open port cylinder with a non-window piston. The piston and cylinder were scored when I received it. I cleaned up the cylinder with muriatic acid and a Scotch brite pad. There were no observable scratches that I could see or feel after I finished, but there was some discoloration where the cylinder was scored. I replaced the piston with a new Meteor piston and ring that was specified for a model 242. The new piston is a straight skirt, non-window piston and appears to be a good match to the old piston The only difference is the old piston had a a depression/cavity around the wrist pin hole and the new one does not. Upon re-assembly, the compression was only 60 psi even with two cycle oil in the cylinder. This was my first attempt at trying to salvage a cylinder. Was this cylinder too far gone to resurrect, or do I need to check other parts on the saw? Would an OEM piston ring make any difference?
Thanks for any suggestions.
Thanks for any suggestions.