Chainsaw Repair

Well that 130 PSI static isn't helping things for sure .99 opening from 101-102 probabley has little if any effect .

In my way of thinking raising the upper transfers would not be benenficial because of two reasons ,First it would start the transfer at lower crankcase pressure and it conjuction with the exhaust opening there would not be the differentials of pressure existing between them.The transfer pressure phsically at the time of transfer has to be higher than the exiting exhaust pressure or else it just will not happen until it is so .

I wouldn't fiddle with it any more until you figure out why the static pressure is so low .Oh I suppose the intake side of the piston skirt could leak some crankcase pressure but it would really have to be concentric to do that .I mean out of round like a football .I've seen some really  funky pistons do a pretty good job

That flap wheel hone job probabley didn't help things but given enough run time the rings should wear in .Might take a while though .

Don't give up the ship just yet .FWIW the 038 Mag which a lot of folks on this forum have seen in action had a funky intake side from a torn boot .It took me nearly all summer cutting down from a 10 cord pile of oak to seat those rings with 5-10-15 minute run times .When those rings finally decided to straighten up and fly right it was like a jet with an after burner .

New rings on an old cylinder are  not the same thing as a complete new top end .It usually revives them but sometime it just takes longer .

I must have missed that part of a new piston just like I missed the part of new rings .Hmm.

Hmm meaning I missed that part some how .I thought you just tweeked an already good running saw just to get a little more punch out of it rather than to repair what evidently was one with damage .I can't think of any other reason to replace a good piston.  So here is part of an earlier post ----It is 130 with new rings, they should come up some as they seat in. I wonder if we will get 150 out of them.----There wasn't even any mention of a new piston until two posts ago .

Not likely .

RUN IT!