Stihl 056 Mag 2 Piston

[Mot Krig]

Hello,

I am rebuilding my saw (056 mag 2, 56mm bore) and would like to put a new piston in while it's apart. Piston is questionable, probably could be reused but wouldn't be optimal. Has some visual "scoring" but cannot feel them. Same "scoring" on the cylinder, but should be easily cleaned up with some scotchbrite. My fear with the piston is that it will be undersized if I try to polish out the "scoring" on the skirt.

Saw started/ran excellent, but compression was only about 120psi cold. It felt very weak compared to what I was expecting from a saw with this much displacement. By feel, it had about as much torque as my 038 mag with 160psi.

Questions:

-Can I use rings from a TS800? Dimensions look the same so I dont see why not

-Can I use a piston from a TS800? Design is likely different, but does it matter? The other options are a couple of off-brand 056 pistons. OEM or other recommended aftermarket pistons don't seem to be available anymore. I'm thinking my existing piston is probably better than cheap knockoff.

-Any other options for a piston other than stated above?



The plan is to use this for a sawmill, although it will only see very occasional use.


Thank you

 

[DND 9000]

The piston rings from the 056 Magnum and the TS 800 are the same (part no.: 1115 034 3013). The pistons have different part numbers.

 

[Mot Krig]

Excellent, thank you. Anyone have any ideas on alternate pistons?