Mitragorz
ArboristSite Lurker
Hey guys, first post here.
I’ve got a Stihl MS290 that I’ve been using to take down some trees in the yard. Was running great for a few days. Then all of a sudden, the chain just started getting stuck. I’d be in the middle of a cut and it would just stop.
After a handful of times of taking the cover off, bar off, chain off, I noticed that the bar sprocket was completely worn. The teeth were flush with the bar, no protrusion at all.
Ok, so new bar and new chains ordered. Got the new bar today, same part number as the original (I’m guessing) bar.
I get in a few cuts and the same thing starts happening. Chain is stuck. Tension seems fine, adjusted the way I’ve been running the saw for years.
Take the bar/chain off, spin the bar sprocket... Moves freely. Put everything back together, give the chain a spin. Still good.
Put it to wood, 15 seconds in, chain stops again. Take it all off again, but leave the chain on the bar.
Clutch spins freely. Chain will not move on the bar.
I noticed that the inside teeth of the chain were actually jammed between the bar and bar sprocket.
That must’ve been what happened to the old bar. Obviously is something I’m doing/not doing. Chain tension seems fine. Maybe the oiler needs to be adjusted (if it can be on this saw)?
What do you guys think? Pic is attached. This isn’t the worst jam, so it’s tough to see... But you can see that the nub is “next to” the chain tooth, and not in between them. I put the saw down and used my little 14” Harbor Freight electric saw that’s usually reserved for branch duty. Got the rest of today’s work done, slowly but surely
I’ve got a Stihl MS290 that I’ve been using to take down some trees in the yard. Was running great for a few days. Then all of a sudden, the chain just started getting stuck. I’d be in the middle of a cut and it would just stop.
After a handful of times of taking the cover off, bar off, chain off, I noticed that the bar sprocket was completely worn. The teeth were flush with the bar, no protrusion at all.
Ok, so new bar and new chains ordered. Got the new bar today, same part number as the original (I’m guessing) bar.
I get in a few cuts and the same thing starts happening. Chain is stuck. Tension seems fine, adjusted the way I’ve been running the saw for years.
Take the bar/chain off, spin the bar sprocket... Moves freely. Put everything back together, give the chain a spin. Still good.
Put it to wood, 15 seconds in, chain stops again. Take it all off again, but leave the chain on the bar.
Clutch spins freely. Chain will not move on the bar.
I noticed that the inside teeth of the chain were actually jammed between the bar and bar sprocket.
That must’ve been what happened to the old bar. Obviously is something I’m doing/not doing. Chain tension seems fine. Maybe the oiler needs to be adjusted (if it can be on this saw)?
What do you guys think? Pic is attached. This isn’t the worst jam, so it’s tough to see... But you can see that the nub is “next to” the chain tooth, and not in between them. I put the saw down and used my little 14” Harbor Freight electric saw that’s usually reserved for branch duty. Got the rest of today’s work done, slowly but surely