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My Exmark Quest Zero-Turn Mower Blade Won't Turn

The Exmark Quest Zero-Turn mower is equipped with a Briggs & Stratton engine and is specifically designed to allow for a zero-degree turn radius in order to provide for greater maneuverability. Problems with the mower blades turning are usually result from the failure of the PTO (power takeoff) clutch, which is responsible for converting power to the mower blades. You can fix the PTO clutch and get your mower's blades working again by dismantling the flywheel to access the clutch shaft. Professional help is not necessary.

Things You'll Need

  • Socket wrench
  • Flywheel pulley
  • File
  • Rubber mallet
  • Replacement clutch shaft
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Instructions

    • 1

      Power off the Exmark Quest Zero-Turn mower. Open the front engine cover.

    • 2

      Locate the Exmark's flywheel. The flywheel is an iron part with a cover that conceals its fins. With the cover in place the flywheel will appear as a fairly large circular part on the top of the engine that is held in place by numerous bolts. Remove each of these bolts with a socket wrench.

    • 3

      Remove the Exmark Quest Zero-Turn mower's flywheel cover from the flywheel.

    • 4

      Remove the bolt located at the center of the exposed Exmark mower's flywheel with the socket wrench.

    • 5

      Align a flywheel pulley over the Exmark mower's exposed flywheel so that the pulley's arms are lowered over the outside of the flywheel.

    • 6

      Tighten the center bolt on the pulley with your socket wrench. Continue tightening until the subsequent pressure causes the flywheel to pop free from the mower. The removal of the flywheel will reveal the top of the PTO clutch shaft.

    • 7

      File down any burrs on the mower's flywheel using a file. There may be burrs along the outer fins of the flywheel.

    • 8

      Locate the oil pan beneath where you removed the flywheel. The oil pan will be attached to the bottom of the PTO clutch shaft assembly. Take out each of the bolts that secure the oil pan with your socket wrench in order to remove the pan. This will reveal the bottom of the PTO clutch shaft.

    • 9

      Ensure that the PTO clutch shaft is secure and is not wobbly. A number of bolts hold the shaft in place where it runs vertically from where the flywheel previously resided down to where the oil pan previously resided. Tighten these bolts on the clutch shaft with your socket wrench if necessary.

    • 10

      Replace the shaft entirely if your repairs are ineffective. Remove the bolts along the clutch shaft with your wrench, then strike the top of the exposed clutch shaft with a rubber mallet to dislodge it. You will be striking the center of the area directly below where the flywheel previously resided.

    • 11

      Slide in a replacement Exmark Quest Zero-Turn mower clutch shaft.

    • 12

      Reassemble the mower by following your disassembly steps in reverse.