January 1, 2015

How to replace the electric clutch on a zero-turn riding mower

By Lyle Weischwill
How to replace the electric clutch on a zero-turn riding mower

This DIY repair guide shows how to replace an electric clutch on a zero-turn riding mower. The electric clutch is attached to the engine crankshaft and controls the mower’s cutting blades. If the mower’s blades won’t engage or disengage correctly, replace the clutch with a manufacturer-approved replacement part.

Follow the steps in this repair guide and video to replace the electric clutch on common Craftsman, Troybilt, MTD, Husqvarna, Toro and Cub Cadet zero-turn riding mowers.

See all our riding mower and lawn tractor DIY repair guides for more step-by-step instructions.

Quick links
Tools required
Socket wrench set
Work gloves
Repair difficulty
Time required
45 minutes or less
Repair difficulty
Time required
45 minutes or less
Replacing an electric clutch on a zero-turn riding mower

This video explains how to replace the electric clutch on a zero-turn riding mower.

Instructions

  1. 01.

    Disconnect the spark plugs

    Move the mower to a work area on a hard, level surface and set the parking brake. Disconnect the spark plug wires.

    Tip: Enlist a helper to assist you when you remove the clutch.
    Disconnect the spark plugs.

    Disconnect the spark plugs.

  2. 02.

    Release the blade belt

    Lower the mower deck to the lowest cutting position.

    Remove the left pulley cover from the mower deck.

    Push in the blade belt idler pulley to release belt tension and then roll the blade drive belt off the left blade pulley.

    Reach under the rear of the mower frame and remove the blade drive belt from the electric clutch.

    Lower the mower deck.

    Lower the mower deck.

    Remove the pulley cover.

    Remove the pulley cover.

    Roll the blade belt off of the pulley.

    Roll the blade belt off of the pulley.

    Release the blade belt from the electric clutch.

    Release the blade belt from the electric clutch.

  3. 03.

    Remove the electric clutch

    Unplug the electric clutch wiring harness beside the motor.

    Remove the mounting screws from the flywheel cover and pull the cover off to access the flywheel nut.

    Have a helper hold the flywheel nut stationary while you remove the mounting bolt from the clutch.

    Pull the electric clutch off the engine crankshaft.

    Tip: Note the routing of the electric clutch wiring harness when pulling the clutch off the engine shaft.
    Unplug the electric clutch wire harness.

    Unplug the electric clutch wire harness.

    Remove the flywheel cover screws.

    Remove the flywheel cover screws.

    Remove the flywheel cover.

    Remove the flywheel cover.

    Hold the flywheel nut stationary.

    Hold the flywheel nut stationary.

    Remove the electric clutch mounting bolt.

    Remove the electric clutch mounting bolt.

    Remove the electric clutch.

    Remove the electric clutch.

  4. 04.

    Install the new electric clutch

    Position the bushing on top of the electric clutch.

    Line up the slot in the electric clutch pulley with the key in the engine shaft and push the electric clutch onto the engine shaft.

    Make sure the tab in the electric clutch bracket engages the mounting slot on the electric clutch frame.

    While your helper holds the flywheel nut, reinstall the electric clutch mounting bolt.

    Reattach the flywheel cover.

    Reconnect the electric clutch wire harness.

    Tip: Make sure that the electric clutch wire harness is routed to the engine correctly on reassembly.
    Install the new clutch.

    Install the new clutch.

    Tighten the clutch mounting bolt.

    Tighten the clutch mounting bolt.

    Reattach the flywheel cover.

    Reattach the flywheel cover.

    Reconnect the wire harness.

    Reconnect the wire harness.

  5. 05.

    Reinstall the blade belt

    Reinstall the blade drive belt onto the electric clutch.

    Push in the blade belt idler pulley and roll the blade belt onto the left blade pulley.

    Reinstall the pulley cover.

    Tip: Make sure that the blade belt is routed correctly when reinstalling the blade belt.
    Reinstall the belt on the electric clutch.

    Reinstall the belt on the electric clutch.

    Roll the belt on the pulley.

    Roll the belt on the pulley.

    Reinstall the pulley cover.

    Reinstall the pulley cover.

  6. 06.

    Reconnect the spark plugs

    Reconnect the spark plug wires to the spark plugs.

    Reconnect the spark plugs.

    Reconnect the spark plugs.

Warning: Undertaking repairs to appliances can be hazardous. Use the proper tools and safety equipment noted in the guide and follow all instructions. Do not proceed until you are confident that you understand all of the steps and are capable of completing the repair. Some repairs should only be performed by a qualified technician.

Symptoms common to all riding mowers & tractors

Choose a symptom to see related riding mower and lawn tractor repairs.

Main causes: dead battery, stale fuel, bad starter solenoid, ignition system problem, bad ignition interlock switch, clogged carburetor
Main causes: damaged cutting blade, worn deck pulley, damaged mandrel pulley, loose fasteners on mower deck components
Main causes: shift lever needs adjustment, neutral control needs adjustment
Main causes: engine overfilled with oil, leaky head gasket or sump gasket, damaged carburetor seals, cracked fuel pump, broken fuel line
Main causes: punctured tire or inner tube, leaky valve stem, damaged wheel rim
Main causes: worn or broken ground drive belt, bad seat switch, transaxle freewheel control engaged, transaxle failure, dirty carburetor
Main causes: unlevel mower deck, dull or damaged cutting blades, worn mandrel pulleys, bent mower deck, engine needs tune up
Main causes: worn or broken blade belt, broken belt idler pulley, blade clutch cable failure, bad PTO switch, damaged mandrel pulleys
Main causes: clogged carburetor, damaged flywheel key, dirty spark plug, stale fuel, improper valve lash, engine needs a tune up

Repair guides common to all riding mowers & tractors

These step-by-step repair guides will help you safely fix what’s broken on your riding mower or lawn tractor.

How to replace the air filter on a riding lawn mower

Get your mower running smoothly again by replacing the air filter—it's a quick job you can do yourself, following these steps.

Repair difficulty
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How to replace the starter motor on a riding lawn mower

If you hear the solenoid click but don’t hear the starter motor spin when you turn the key, follow these steps to replace it.

Repair difficulty
Time required
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January 1, 2015
By Lyle Weischwill
How to replace a riding lawn mower blade

If a blade on your mower is dull or bent, replace it following the steps in this repair guide.

Repair difficulty
Time required
 30 minutes or less

Articles and videos common to all riding mowers & tractors

Use the advice and tips in these articles and videos to get the most out of your riding mower or lawn tractor.

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