Troy-Bilt TB320 Operation Manual - Page 18

Troubleshooting 8 Problem Engine Fails to start Engine runs erratic Engine overheats Occasional skips (hesitates) at high speed Idles poorly Excessive Vibration Cause Remedy 1. Blade control disengaged. 2. Spark plug boot disconnected. 3. Fuel tank empty or stale fuel. 4. Engine not primed (if equipped with primer). 5. Faulty spark plug. 6. Blocked fuel line. 7. Engine flooded. 8. Fuel valve (if equipped) closed. 9. Engine not choked (if equipped with choke). 10. Burnt fuse. (Electric Start only) 1. Spark plug boot loose. 2. Blocked fuel line or stale fuel. 3. Vent in gas cap plugged. 4. Water or dirt in fuel system. 5. Dirty air cleaner. 6. Unit running with CHOKE (if equipped) applied. 1. Engine oil level low. 2. Air flow restricted. 1. Spark plug gap too close. 1. Engage blade control. 2. Connect wire to spark boot. 3. Fill tank with clean, fresh gasoline. 4. Prime engine as instructed in the Operation section. 5. Clean, adjust gap, or replace. 6. Clean fuel line. 7. Wait a few minutes to restart, but do not prime. 8. Open fuel valve. See engine manual. 9. Choke engine. See engine manual. 10. Replace fuse (see Service Section). 1. Connect and tighten spark plug boot. 2. Clean fuel line; fill tank with clean, fresh gasoline. 3. Clear vent. 4. Drain fuel tank. Refill with fresh fuel. 5. Refer to engine manual. 6. Push CHOKE knob in. 1. Fill crankcase with proper oil. 2. Clean area around and on top of engine. 1. Adjust gap to .030". 1. Spark plug fouled, faulty, or gap too wide. 2. Dirty air cleaner. 1. Cutting blade loose or unbalanced. 2. Bent cutting blade. 1. Reset gap to .030" or replace spark plug. 2. Refer to engine manual. 1. Tighten blade and adapter. Balance blade. 2. See an authorized service dealer. Continued on next page 18