MTD 21AA404B031 - Troubleshooting

Troubleshooting
Problem
Engine does not start
1,
2.
3.
Cause
Spark plug wire disconnected. 1.
Engine Throttle Control Lever incorrectly set. 2.
Fuel tank empty. 3.
Remedy
Reconnect wire.
Put lever in START position.
Add fuel.
4. Stale gasoline.
5. Dirty air filter.
4. Drain fuel and add fresh fuel.
5. Clean or replace filter (see Engine
Maintenance section).
Engine runs poorly
Engine overheats
Engine does not shut off
Wheels/Tines will not turn
Tines turn, but wheels don't
Wheels turn, but tines Don't
Poor tilling performance
6.
Z
8.
9.
1.
2.
3.
4.
5.
6.
1.
2.
3.
1.
1,
2.
3.
4.
1.
2.
3.
1.
2.
3.
1.
Defective or incorrectly gapped spark plug. 6.
Carburetor out of adjustment. 7.
Misadjusted throttle control. 8.
Dirt or water in fuel tank. 9.
Defective or incorrectly gapped spark plug. 1.
Dirty air filter(s). 2.
Carburetor out of adjustment. 3.
Stale gasoline. 4.
Dirt or water in fuel tank. 5.
Engine cooling system clogged. 6.
Engine cooling system clogged. 1.
Carburetor out of adjustment. 2.
Oil level is low. 3.
Misadjusted throttle control or ignition 1.
switch.
Improper use of controls. 1.
Worn, broken, or misadjusted drive belt(s). 2.
Internal transmission wear or damage. 3.
Bolt loose in transmission pulley. 4.
Wheel Drive Pins not in WHEEL DRIVE. 1.
Bolt loose in transmission pulley. 2.
Internal transmission wear or damage. 3.
Tine holder mounting hardware missing, 1.
Bolt loose in transmission pulley, 2.
Internal transmission wear or damage. 3,
Worn tines. 1.
Inspect spark plug (see Engine Maintenance
section).
See Engine Service Dealer
See Engine Service Dealer
See Engine Service Dealer
Inspect spark plug (see Engine Maintenance).
Clean or replace (see Engine Maintenance).
See Engine Service Dealer.
Replace with fresh gasoline.
See Engine Service Dealer.
Clean air cooling system (see Engine Maint.).
Clean air cooling area (see Engine Maint.).
See Engine Service Dealer
Check oil level (see Engine Maintenance).
See Engine Maintenance section or Service
Dealer.
Review Operation section.
Replace or adjust belts.
Contact local dealer or the factory.
Tighten bolt.
Inserts Drive Pins properly.
Tighten bolt.
Contact local Dealer or the Factory.
Replace hardware.
Tighten bolt.
Contact local Dealer or tile Factory.
Replace Tines.
2. Improper Depth Regulator setting.
3. Incorrect throttle setting.
4. Forward Drive Belt slipping.
2, See "Tilling Tips &Techniques."
3. See Maintenance & Adjustments Section.
4. See Maintenance & Adjustments Section.