piston and cylinder scored chainsaw

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  1. P

    Where’d the other ring go? 009L 1120 series

    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??
  2. W

    034 Super Piston Replacement

    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...
  3. P

    MS391 Top End rebuild project

    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...
  4. A

    Slight damage to plating edge near ports. Okay to use?

    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...
  5. BR Wood

    Stihl 066 32" Bar Lean Seize Failure - Advice

    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...
  6. Khalil1090

    Mcculloch PM610 Piston Rebuild Questions / Help

    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...
  7. CristiRo

    Scored Piston - Jonsered 2258

    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...
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