No Compression on Chainsaw Engine
After much fussing, I found my Poulan 2775 Chainsaw will not start because there is inadequate compression. Looking at the exhaust port, there appears to be scoring on the piston. There is no significant carbon buildup, however.
Is it possible to repair by honing the cylinder and moving the radial position of the piston ring?
Should I replace the piston and ring?
Must I replace the cylinder (probably will through the unit away in this case)?
Any other ideas?
What could cause the scoring / loss of compression if there is no carbon in the exhaust port? I was using a slightly rich oil mix (32:1, 40:1 recommended). The engine would rev up momentarily when gas ran out of the tank and the air/fuel mix ran lean. But this would only be for maybe five seconds.