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Lawn Mower Blades Won't Engage

The 2 most common part(s) or condition(s) which contribute to the symptom Lawn mower blades won't engage are listed below. Check or test each item and watch any available videos. If you are still unable to solve the problem you may need to do additional research and troubleshooting. Remember, with our 365 Days. Period.® return policy you can return any part for any reason. So, go ahead and buy it to try it. No other parts retailer offers this unconditional return policy.


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For the symptom you selected, these are the most common parts or causes, ordered by the likelihood of fixing the symptom.

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PTO Clutch

If the blades don't rotate the electric PTO clutch might not be engaging. The PTO - or Power Take Off clutch provides a non-mechanical way to disconnect the engine from the blades. When electricity is applied to the clutch solenoid the clutch engages. Attached to the clutch is a pulley, a belt from the engine crankshaft pulley to the PTO provides the rotation of the blades. If power doesn't reach the PTO, or if the solenoid is defective, or if the clutch is worn out, the blades will not engage. The PTO clutch is not repairable, if defective or worn out it will need to be replaced.

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PTO Switch

The PTO switch provides power to the PTO clutch. If the switch is defective or doesn't have continuity, power might not be supplied to the PTO clutch and then it won't engage and the blades don't rotate. Check the switch with an Ohm meter for continuity.

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