If your Worx lawn mower blades won't engage, the problem usually comes down to the PTO clutch first, then the PTO switch. On many riding mowers, the PTO clutch uses an energized solenoid to connect engine power to the drive system so the mower blade can spin. If the clutch is not getting power, the solenoid has failed, or the clutch is simply worn out, the lawn mower blades won't engage and the deck blades will not turn. The next likely cause is a bad PTO switch, which may fail to send power to the clutch at all. If you are dealing with riding mower blades not engaging or a mower PTO clutch not working, check the switch with a multimeter for continuity and replace it if it tests bad. Because the PTO clutch itself is not repairable, a failed clutch needs to be replaced as a complete assembly. To make sure you get the right Worx part for your mower, enter your model number on RepairClinic.com to find the exact PTO clutch, PTO switch, or other replacement part that fits your machine.
01 - Worx PTO Clutch
The PTO (Power Take Off) clutch provides a means of manually disconnecting the engine from the blades. When the clutch solenoid is energized, the clutch engages the drive belt to drive the rotation of the lawn mower blades. If the PTO clutch is not getting power, if the clutch solenoid is defective, or if the clutch is worn out, the lawn mower blades will not engage. The PTO clutch is not repairable—if the clutch is defective, you must replace it.
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The PTO switch provides power to the PTO clutch. If the switch is defective, it may not supply power to the PTO clutch. As a result, the clutch won’t engage, and the lawn mower blades won’t rotate. To determine if the switch is defective, use a multimeter to test it for continuity. If the PTO switch is defective, replace it.