Chainsaw Repair

Al Smith really can't tell you for sure how much they should have .I've never taken a comp reading on any of the Macs .

I have a 125 that I resleeved and as of yet doubt it's got over 1 hour running time .That engine is 123 cc and without using the decomp is almost impossible to pull over .This praticular one mentioned has not seated the rings yet and as such can be rolled without the decomp .Once that old dog is running it cuts just about as good as another I have which is well seated .

Some of them will surprise you .It may be the fact that on a 2 cycle the rings tend to tighten up under power .That's about the only thing I can come up with because I honestly don't know .

Now on those PM 650's which is a later version of a PM 610 they had thin rings which probabley accounts for the higher static compression readings .