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Service & Maintenance Question

    Greg Pruitt
    Have a 130BT back pack blower. Starts fine and stays...
    Service & Maintenance Question posted November 24, 2016 by Greg Pruitt 
    59 Views, 1 Comment
    Question:
    Have a 130BT back pack blower. Starts fine and stays running, but only accelerates to about 1/2 throttle. Now it is making a knocking sound when it gets to 1/2 throttle. Cleaned filter and spark plug. Also changed out fuel

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    Answer

     

    • Eugene Rounds

      Replace the spark plug. The IPl shows it to be a NGK CMR7H. These plugs can fail this way as they can get to where they won't under the compression load; cleaning the plug won't do any good. I repaired two of the backpack blowers last year that where knocking and this was the case.

      Also while the plug is out gives engine a few good pulls to clear any loose carbon.

       

       

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