If your Wheel Horse lawn mower blades won't engage, the problem is usually in the PTO system that transfers engine power to the deck. The most common cause is a failed PTO clutch. If the PTO clutch is not getting power, the clutch solenoid is defective, or the clutch itself is worn out, the clutch will not engage the drive belt and the mower blade will not turn. The next likely cause is a bad PTO switch. A faulty mower PTO switch may not send power to the clutch, which leaves you with riding mower blades not engaging even though the engine runs normally. Testing the switch with a multimeter for continuity is the right first check, and if the PTO clutch has power but still will not engage, the clutch will need to be replaced since it is not repairable. This is a common fix for a Wheel Horse riding mower deck blades will not turn complaint. To make sure you get the exact PTO clutch, PTO switch, blade, belt, or other replacement part for your specific mower, enter your model number on RepairClinic.com.
01 - Wheel Horse 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.