scoring

Hello, everyone. Have been lurking on these forums for a while. About a year ago, in March 2023, I purchased MS 261 saw with a carb from my local Stihl dealer. Manufactured in August 2022. I have had to adjust the carb with a tachometer as initially had some issues restarting the saw when hot...

So, My Makita dcs520 has been a great saw up until the last few uses where i noticed it started smoking quite a bit on startup, it's been down on power and I've found it to be bogging down a lot when getting on the dogs. a cold compression test returned 70-80PSI which was much lower than what...

Hey everyone. I just bought this used 036-cylinder off eBay. It has some odd pitting, as seen from the pictures. The ad said no scoring but didn’t mention anything about the pitting. The pictures were too far away and out of focus to see the issues. My question is, would you run it, or would you...

Hello arborists! I've really learned a lot from this great forum -- thanks so much for helping folks out with their questions. I'm hoping to get a bit of advice on the piston shown below. It's in a used MS462C that I recently purchased for a good price -- it has great throttle response and...

Hey y'all, I have two ms-261's that are both showing some scorch marks at the top of the piston on the exhaust side. They still seem to be running well and have good compression (by feel not with a gauge), and I can't see any scoring in the cylinder or on the piston. My question is, now that...

scored the piston on my dads 391 the other day while milling, saw went way down on power then just died I havent pulled the cylinder off yet, but im just wondering, how much damage do yall think there will be? and could it be honed out and just put a new piston in? exhaust side of the piston...

Hi all at AS.If a saw had a vac leak (not that any of mine have) would one of the first checks be to screw the idle screw right out.If the saw doesnt stop or keep high revs this could be a vac leak right? I know other problems can cause this but just applying this to vac leaks. Cheers,Chris.