piston and cylinder scored chainsaw

It runs — don’t know how with ~30 - 45psi compression. New piston is on the way — the cylinder looks okay to me… but seriously WHERED the ring go??

Hello all! Long time lurker and first post, very exciting. :D I have an 034 Super, all original looking and very clean, that I got off a guy selling out a rather large collection. Upon detailed inspection when I got it home, I noticed a slight score starting on clutch side of exhaust port...

Hi everyone, I picked up a decent looking MS391 (PHO) on CL for $40, about 5 years old. The seller told me he accidentally straight gassed it. Thought he had put the oil in the 1 gallon can, then filled at the station, and the rest is history. He had bought it to mill with and it didn't seem...

Hello chainsaw experts, This is an VI 955 cylinder where the piston scuffed the wall and began to wear through plating at port edges. Would this present future problems, decrease longevity, or cause any performance issues? If okay to use, what should be done to minimize any negative impact? I...

I just found out that it sounds like my Stihl 066 had a Lean Seizure. I had the coil replaced by a guy that didn't know that it was out but was a "Small Engine Repair" person. After he couldn't get the saw to start I started taking pics and on another Stihl forum I was told that this pic...

Hello Everyone! This is my first day as a member here. I look forward to providing any help I can in Restoration and rebuild projects. I also look forward to any help that anyone can provide! It's always appreciated. Lost my Grandpa to cancer a few years back and his chainsaw was handed down to...

After cutting some firewood, I decided to take off the muffler to see the P&C... Wow...wasn't prepared for that...the piston is scored half way down the piston, on a width of about 5mm. I'm using Sthil HP Ultra. Used this Ultra oil for 4L of gas with 40:1(25ml/1L) ratio. Before that the saw was...