If your Exmark lawn mower blades won't engage, the problem usually starts with the PTO clutch. The PTO clutch transfers engine power to the deck through the belt system, and if it is not getting power, the clutch solenoid has failed, or the clutch itself is worn out, the blades will not turn. On many Exmark models, a bad PTO clutch is the most likely reason riding mower blades are not engaging. The next part to check is the PTO switch, which sends power to the clutch. If the switch has no continuity, the mower PTO switch problem can keep the clutch from engaging and leave the riding mower deck blades will not turn. Because the PTO clutch is not repairable, a faulty one needs to be replaced. A defective PTO switch should be replaced as well after testing with a multimeter. If you need an Exmark PTO clutch, PTO switch, mower blade, or related lawn mower belt and deck parts, enter your model number on RepairClinic.com to find the exact replacement part that fits your specific mower.
01 - Exmark Lawn Mower 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.