If your Husqvarna lawn mower blades won't engage, the problem is usually in the PTO system that transfers engine power to the deck blades. The most common cause is a failed PTO clutch. If the clutch is not getting power, the clutch solenoid is bad, or the clutch is simply worn out, the blades will not engage and the deck will not turn. Next, check the PTO switch, since a bad switch may not send power to the PTO clutch at all. On many riding mower blades not engaging complaints, a multimeter continuity test on the PTO switch is a smart first step before replacing parts. This kind of mower PTO clutch not working issue can look electrical even when the clutch itself has failed, so it helps to test methodically. If your Husqvarna riding mower deck blades will not turn, RepairClinic.com makes it easier to match the right PTO clutch, PTO switch, mower blade, belt, and other lawn mower parts to your exact machine. Enter your model number on RepairClinic.com to find the exact replacement part that fits your specific Husqvarna mower.
01 - Husqvarna 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.