I bought an older Stihl 021 off of ebay about 3 months ago, it came with 4 used chains, I just broke the 3rd chain this afternoon! They did not appear to me to be worn that much, but that is why I am asking you! There was still alot of teeth left that is why I say they were not worn out.
The last time I used this saw I had sharpened the chain just before, and something strange happened while sharpening it, the chain refused to go around, so I could get to the next tooth, it acted like the chain brake was on! I checked and it was not on, and then I tried to reverse the direction of the chain and it went the other way, but hung up in this one spot, so I just finished sharpening it, when I was done, it slid around in either direction!
While I was cutting with it last time, I noticed that sometimes when I went to rev up the saw, the chain would catch, like it was stuck, then it would go, once I had to help it, by nudging the tree, and then it was free, I could rev it up and cut. I also noticed that if I cut with the center section of the bar, not right up close to the saw, it would make a chattering noise as I was cutting.
With all of that said is it me, old junk chains, the saw, maybe clutch, or brake? I am going to try to include some pictures, I also checked the bar sprocket teeth, and they turn smoothly.
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Are the lower (inside) drive teeth of the chain supposed to look like this?
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It does appear that is some kind of wear on the drive sprocket.
Thanks for any help you can provide!
Shawn
The last time I used this saw I had sharpened the chain just before, and something strange happened while sharpening it, the chain refused to go around, so I could get to the next tooth, it acted like the chain brake was on! I checked and it was not on, and then I tried to reverse the direction of the chain and it went the other way, but hung up in this one spot, so I just finished sharpening it, when I was done, it slid around in either direction!
While I was cutting with it last time, I noticed that sometimes when I went to rev up the saw, the chain would catch, like it was stuck, then it would go, once I had to help it, by nudging the tree, and then it was free, I could rev it up and cut. I also noticed that if I cut with the center section of the bar, not right up close to the saw, it would make a chattering noise as I was cutting.
With all of that said is it me, old junk chains, the saw, maybe clutch, or brake? I am going to try to include some pictures, I also checked the bar sprocket teeth, and they turn smoothly.
<a ="http://photobucket.com" target="_blank"><img src="http://i153.photobucket.com/albums/s220/ShawnTVT/Img_7707.jpg" border="0" alt="Photo Sharing and Video Hosting at Photobucket"></a>
Are the lower (inside) drive teeth of the chain supposed to look like this?
<a ="http://photobucket.com" target="_blank"><img src="http://i153.photobucket.com/albums/s220/ShawnTVT/Img_7706.jpg" border="0" alt="Photo Sharing and Video Hosting at Photobucket"></a>
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It does appear that is some kind of wear on the drive sprocket.
Thanks for any help you can provide!
Shawn