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If the blade does not turn when you squeeze the throttle trigger of the powerhead, make sure the attachment is fully inserted into the coupler. Always release the throttle trigger and allow powerhead engine to return to idle speed when not cutting. The blade should not turn while the engine is running at idle. If the blade turns at idle, do not use your unit. Refer to the CARBURETOR ADJUSTMENT section of the powerhead manual or contact your authorized service dealer. S Maintain good firm footing