Chainsaw Repair

That was what I was thinking, running hot. That 660 popup piston got me thinking  but I probably got the power I think better filing

I keep trying square filling but don't quite get it yet, it's ok but not what it should be and no one around here that I know of sharpens it

I start off with a  new loop of square ground .404 chisel bit.The factory 15 degree top plate angle is close enough for milling.
I can go quite a while before I notice it dulling, holds a better edge and faster  from what I'm finding compared to my round filed chain.
Mind you I'm really fussy about keep the wood clean so I don't dull the chain as fast.

I can touch up the cutter's on the Alaskan mill with the flat chisel bit file free hand not too bad.  But after about 3 touchups the angles start to go wonky. Then I gotta switch chains, I then have to file the wonky cutters in my shop in the bench vise then I get the angles back.

I've heard of a few guys on the west coast who have success milling with square ground but one grinds his loops and switches them out. Other guy files free hand.