Good or bad or ugly side compression?

[Huskybill]

With used saws what’s good compression?

What would good compression be for a 570xp saw? Average....

I’ve always purchased new saws. I’m learning about used saws. I figure if it has low compression we must factor in new rings minimum but needing a cylinder, piston & rings, gaskets. We might as well do the crank bearings and seals. We must factor in the cost too. Just thinking out loud. Any help is welcome.

 

[Stihlbillie]

150 psi good number for any gas engine

 

[Justsaws]

Depending on the compression tester, how much fuel, oil, grease is in the engine, component condition and engine design compression numbers will be all over the place.

There is no single good number for all saws using any compression tester. Reed valve saws can show strong compression with severely damaged pistons and cylinders. Some piston ported designs barely hit 120.

 

[dmb2613]

you are a posting machine

 

[Huskybill]

you are a posting machine

I think it’s a legit question.?

I purchased another husky 570xp with 145# compression. I ordered a full wrap around handle for felling. I think I’m going to lose one 570 to the son anyway.