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I can’t get my sthil bg86c blower to rev up properly, obviously I have changed filters, plug and cleaned everything including gas filter now I’m stumped

Posted by Fred Mitchell on

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Try cleaning the exhaust screen

Posted on Jun 24, 2020

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Vernon Taylor

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It could be a weak spark but most likely it is not receiving the fuel it needs for full throttle operation.

Assuming the fuel is fresh and there isn't an excess of oil this can be tested to some degree by opening the throttle fully and then partially applying the cold start if it can be applied separately or partially covering the intake of the carb with a finger if it can't.
If this improves things it proves the mixture is too lean and it could be a blockage or a matter of adjustment.

One thought occurs - if it was ok before being idle over winter, it is possible the crankshaft oil seals have lost flexibility and air is being drawn past them into the crankcase.

Posted on Jun 24, 2020

  • Fred Mitchell Jun 24, 2020

    Is there any other filters for the fuel

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