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Stihl MS 192T running problems


Fozzie
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Hi folks. I have had a MS192T for a few years, which always ran like a dream, until yesterday!

 

It was running fine, I made a cut, but when I had finished it, the saw kept running faster than tickover. Got it to the ground and tried it again, still running fast, but revs up, albeit not running brilliant at full speed. It feels like a carburetion issue, but tweaking the carb did not help (why would it have gone out of adjustment in an instant anyway). Stripped it down, but the little membrane / pump thingies both look intact.

 

Does anyone have any ideas? Would it be worth getting a carb kit and changing the membrane / pump diaphragm even though to the naked eye they look ok, or is it likely to be something else?

 

Thanks in antipitation... :-)

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possible light seize, worth getting a glimpse of the piston through the exhaust port and if that is OK, perhaps it is air leak in the inlet manifold or impulse line!

 

Also worth checking the gauze strainer in the carb - another common fault.

 

 

Aren't you on holiday Spud?!

 

Take a day off!

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