Exmark COMMERCIAL 30 Operator's Manual page 38

Troubleshooting
Problem
Discharge chute plugs.
Lawn mower does not self-propel.
Blades do not rotate or slip.
Blades contacting each other.
Possible Cause
1. The throttle-choke-engine stop control is
not in the Fast position.
2. Cutting too much grass in one pass
3. Mowing too fast.
4. The grass is wet.
5. The underside of the lawn mower deck
contains clippings and debris.
1. The self-propel drive cable is out of
adjustment or is damaged.
2. There is debris under the frame.
3. Check belt for damage.
1. BBC belt or timing belt is worn, loose, or
broken.
2. BBC belt is off pulley.
3. BBC cable is worn, loose, or broken.
1. Blades are installed or aligned incorrectly.
2. Blade adapters are worn, loose, or broken.
3. Timing belt is worn, loose, or broken.
4. Timing sprockets or idler pulley is worn,
loose, or broken.
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Corrective Action
1. Move the control to the Fast position.
2. Raise the cutting height. If necessary, cut
a second time at lower cutting height.
3. Slow down.
4. Allow the grass to dry before mowing.
5. Clean the underside of the lawn mower
deck.
1. Adjust the self-propel drive cable. Replace
the cable if necessary.
2. Clean the debris from under the frame.
3. Replace belt.
1. Adjust BBC cable; adjust timing belt
tension. Replace if necessary.
2. Check belt for damage; replace if
necessary.
3. Adjust BBC cable; replace if necessary.
1. Reinstall blades.
2. Replace blade adapters.
3. Re-time blades and adjust timing belt
tension; replace if necessary.
4. Replace sprockets or idler pulley if
necessary.