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Stihl 170 not switching off


Bluebird
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Has anybody had problems with small Stihls eg 180, 170 in not being able to switch them off. In other words, the O position fails to action. I know what the problem is in that the plastic switch bar unseats itself so that the metal spring is unable to make the appropriate connection to stop the engine. This switch arrangement is on quite a few models and Stihl must be aware of it being  a design fault and also a safety issue but still must sell these chainsaws in their thousands without seemingly not bothering to modify the system. 
Would be happy to learn of your experiences.

Edited by Bluebird
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I came across a few videos on fixes for this switch when I was looking for help on my 461. I think people were heating and remoulding the holder, or filing the profile on the shaft itself. Worth a bit of time in YouTube to see if you can find one that matches yours.

Of course Stihl would say they do have a solution, buy a pro range saw.

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