Chainsaw Repair

Not all saws are the same when it comes to compression, I'm not real sure where the Mcculloch's are. I have some 10-10's and they are around 140 psi. Some of the older saws i hear can run on lower compression. Now modern saw's like a newer Husqvarna 372 can have only 135 and broke in around 145 or so. and they run great!. where if a Stihl 440 had only 140 psi, it would be time to rering it. My 440 has 175psi right now and its not broke in yet. Al Smith from this site can lell you where the Mccullochs should be. I do not know a whole lot about them. Oh yeah, I have a couple ported GTG\race saws that have 200+ psi. I gain compression on saws by tightning the squish and new rings. (If wore out).