Warm it up until the exhaust feels hot to your hand coming out of the muffler, I do this before I cut with a 65+ year old saw or a brand new unit. New oem cylinders are cast then bored to a spec id then the bore is plated and then bored again to the final id then crosshatched/deburred and finally some have a protective coating I assume is for initial startup being some form of moly or graphite that melts off after start up. Warm it up then work it hard, let it idle a few minutes after working it hard to allow the flywheel fan to bring engine temps back down.
What I see killing saw pistons and cylinders is air leaks, lack of air and fuel filtration and over heating often from cylinder fins being packed with sawdust mixed with bar oil or unburnt 2 cycle oil or simply not knowing their running the saw lean from poor carb adjustment. The piston tells the truth.
When you see folks talking about ring seating it can take a few hours of fully loading the saw up cutting to fully wear mate the rings to the cylinder walls for maximum sealing, when folks simply toss new rings into a used cylinder without performing a deglazing it can take 4-5 times longer for the rings leading edges to wear mate into the cylinder wall because it is very smooth, the nikacil or chrome cylinder wall is much harder than the cast iron rings so eventually the rings will wear mate to it creating a better and better seal.
What I see killing saw pistons and cylinders is air leaks, lack of air and fuel filtration and over heating often from cylinder fins being packed with sawdust mixed with bar oil or unburnt 2 cycle oil or simply not knowing their running the saw lean from poor carb adjustment. The piston tells the truth.
When you see folks talking about ring seating it can take a few hours of fully loading the saw up cutting to fully wear mate the rings to the cylinder walls for maximum sealing, when folks simply toss new rings into a used cylinder without performing a deglazing it can take 4-5 times longer for the rings leading edges to wear mate into the cylinder wall because it is very smooth, the nikacil or chrome cylinder wall is much harder than the cast iron rings so eventually the rings will wear mate to it creating a better and better seal.
