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Stihl MS261 stalling when chain brake applied


key261
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Hi everyone

 

Apologies if this has been mentioned before, read up on past posts but I have a slightly different issue.

 

Basically, the saw dies when the brake is applied. The saw has had a new clutch, rim sprocket set including drum and needle bearing, brake band, and new oil worm gear. Now there is movement in the drum, video will show:

 

 

 

So when brake is applied, the drum is being forced into a weird angle and stalling the engine. Anyone have an idea of what to look at next? I've had a look at the crankshaft and its seems ok, a tiny bit of wear but I think its what you'd expect from a 2011 saw. The needle bearing has hardly any movement on it.

 

Thanks everyone!

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Hi guys.

 

The drum is on the oil pump drive. And I've tried 2 new bearing, one being the plastic stihl genuine one, and the other being a metal aftermarket one. Both show the same result, excessive drum movement. I just had it all apart again and i'm starting to think the crankshaft has worn down to much.

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  • 3 months later...

We bought six 261s and after a season of running well the crank has worn on four of them and we are seeing the same issue.  Really unimpressed as we'd been looking after them.  First signs were needle bearings going and before long it would stall and not start with the chain brake on.  Now considering buying new saws and not sure what to replace them with.  Any suggestions?

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