If your Green Machine lawn mower blades won't engage, the problem usually comes down to the PTO clutch first, then the PTO switch. On many riding mower blade engagement problems, the PTO clutch is the most likely failure point because it has to transfer engine power to the drive belt and mower blade system. If the PTO clutch is not getting power, the clutch solenoid has failed, or the clutch is simply worn out, the blades will not turn. Next, check the PTO switch, since a bad switch can keep voltage from reaching the clutch at all. If your Green Machine riding mower blades are not engaging, or the deck blades will not turn, testing the PTO switch with a multimeter for continuity is a smart next step before replacing parts. Because a faulty mower PTO clutch is not repairable, it must be replaced if defective. RepairClinic makes it easier to match the right PTO clutch, PTO switch, blade, belt, and other Green Machine lawn mower parts to your machine. Just enter your model number on RepairClinic.com to find the exact replacement part that fits your specific mower.
01 - Green Machine 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.