Bubba Stump
ArboristSite Operative
Hello all. I am looking for some info on the Pioneer P51. I recently was cleaning out my grandfathers barn and found my granddads old timber falling saw. It is a Pioneer P51 with full wrap handlebar and a 24" bar. The saws crank is free and it has spark but very low compression. I can see scoring on the piston from the exhaust side. I also found a box of parts and there is a new crank, bearings, new cylinder and new rings. Everything is marked P51 with a magic marker so I assume it is extra parts for the saw. I tried to find a NOS piston on ebay but nothing comes up for the P51. I saw on another site where someone said a Poulan pro 525 piston is the same. Is this true? I found two new pistons for a PP525 on ebay and will get one if it will work in the P51. If it does not work in the P51, does anybody know if there is a aftermarket piston or other model powersaw piston that is interchangeable, maybe someplace that will have a NOS pioneer piston?