Exmark VERTEX X Series Operator's Manual page 57

Problem
Clutch will not engage.
Engine idles at full throttle.
Possible Cause
1. Fuse is blown.
2. Low voltage supply at the clutch.
3. Damaged coil.
4. Inadequate current supply.
5. Rotor/armature airgap is too large.
1. Clutch saver relay failure.
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Troubleshooting
Corrective Action
1. Replace fuse. Check coil resistance,
battery charge, charging system, and
wiring connections and replace if
necessary.
2. Check coil resistance, battery charge,
charging system, and wiring connections
and replace if necessary.
3. Replace clutch.
4. Repair or replace clutch lead wire or
electrical system. Clean connector
contacts.
5. Remove shim or replace clutch.
1. Replace clutch saver relay or contact an
Authorized Service Dealer.