Chainsaw Repair

I am doing a post on the modification of a 261 Husqvarna. I want the reader to measure squish prior to taking the saw apart. If you measure squish without cleaning any accumulated carbon off the piston you will get a less that accurate measurement of the squish. Normally this is done with new/clean pistons, so I know it will not be 100% accurate, I just need a ballpark measurement. Should I just forget this stop or can I add/subtract some nominal factor from the squish measurement to partially account for the carbon? What is your experience?

I don't usually bother with carbon removal if there's some there. It's usually not thicker than .002-.003" at the most.

Cooooooool, just what I needed to know. So if they measure 0.035 squish they can add 0.002 to 0.003 to that and get 0.037 to 0.038!

I lift the cylinder ,remove the rings and clean everything up first .Then half the time miss cutting and have to fumble around and make a different gasket .Not a big deal if you don't cut enough .You can always recut it .Kinda tough to put it back on though if you cut too much .