VIDEOClick to see full answer. Similarly one may ask, why won’t my mower blades engage? Most Frequent Causes for Lawn mower blades won’t engage The PTO (Power Take Off) clutch provides a means of manually disconnecting the engine from the 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.Beside above, where is the clutch on a riding lawn mower? Usually, this clutch is attached to the underside of the engine and is shaped as a small bell housing. From this position, it controls the mower blades. You will also be able to identify the clutch if you follow the mower blades. Also question is, how do you check a PTO clutch? How to Test a PTO Clutch Lift the utility vehicle up with a floor jack. Place the negative voltmeter lead on a good engine source. Look for the in-line fuse between the electrical wiring harness from the lever switch to the PTO clutch assembly under the deck. Start the engine and let it warm up. How do you adjust a clutch cable on a lawn mower? Drive Clutch Cable Adjustment With the engine stopped, position. the control cable bands as. shown. Pull the shift lever all the way. back to the neutral position. Start the engine and move the. throttle lever to the FAST. position. Engage the drive clutch lever and. confirm the following: a. Mower does not self-propel. b. Loosen the top and bottom drive.