Troubleshooting - Troy-Bilt 645A-Bronco Operator's Manual

Before performing any corrections, refer to the appropriate information in this Manual, or in the Engine Owner's Manual, for the
correct safety precautions and operating or maintenance procedures. Contact your local authorized Engine Service Dealer for
engine service. Contact your local authorized equipment dealer or the factory for all other service problems.
PROBLEM POSSIBLE CAUSE
Engine does 1. Spark plug wire disconnected.
not start. 2. Engine Throttle Control Lever incorrectly set.
3. Fuel tank empty.
4. Choke control (if so equipped) in incorrect position.
5. Stale gasoline.
6. Dirty air filter(s).
7. Defective or incorrectly gapped spark plug.
8. Carburetor out of adjustment.
9. Misadjusted throttle control cable.
10.Dirt or water in fuel tank.
Engine runs poorly. 1. Defective or incorrectly gapped spark plug.
2. Dirty air filter(s).
3. Carburetor out of adjustment.
4. Stale gasoline.
5. Dirt or water in fuel tank.
6. Engine cooling system clogged.
Engine overheats. 1. Engine cooling system clogged.
2. Carburetor out of adjustment.
3. Oil level is low.
Engine does not
shut off. 1. Misadjusted throttle control or ignition switch.
Wheels and Tines 1. Improper use of controls.
will not turn. 2. Worn, broken, or misadjusted drive belt(s).
3. Internal transmission wear or damage.
4. Bolt loose in transmission pulley.
Tines turn, but 1. Wheel Drive Pins not in WHEEL DRIVE.
wheels don't. 2. Internal transmission wear or damage.
Wheels Turn, but 1. Tine holder mounting hardware missing.
Tines Don't. 2. Internal transmission wear or damage.
Poor tilling 1. Worn tines.
performance. 2. Improper Depth Regulator setting.
3. Incorrect throttle setting.
4. Forward Drive Belt slipping.

TROUBLESHOOTING

1. Reconnect wire.
2. Put lever in START position.
3. Add fuel.
4. See Engine Owner's Manual.
5. Drain fuel and add fresh fuel.
6. Clean or replace filter(s).
7. Inspect spark plug.
8. See Engine Service Dealer.
9. See Engine Service Dealer
10. See Engine Service Dealer.
1. Inspect spark plug (see Engine Owner's Manual).
2. Clean or replace (see Engine Owner's Manual).
3. See Engine Service Dealer.
4. Replace with fresh gasoline.
5. See Engine Service Dealer.
6. Clean air cooling system (see Engine Owner's Manual).
1. Clean air cooling area (see Engine Owner's Manual).
2. See Engine Service Dealer.
3. Check oil level (see Engine Owner's Manual).
1. See Engine Owner's Manual or Engine Service Dealer.
1. Review Sections 3 and 4.
2. See "Checking Drive Belt Tension," Section 5.
4. Tighten bolt.
1. See "Wheel Drive Pins" in Section 3.
2. Contact local Dealer or the Factory.
1. Replace hardware.
2. Contact local Dealer or the Factory.
1. See "Tines" (Section 5).
2. See "Tilling Tips & Techniques," Section 4.
3. See Section 4.
4. See "Checking Forward Drive Belt Tension," Section 5.
Section 5: Maintenance
CORRECTION
3 Contact local dealer or the factory.
25