Troubleshooting - Troy-Bilt Super Bronco Manual Del Propietário

Troubleshooting

Problem
Engine fails to start
Engine runs erratic
Engine overheats
Engine hesitates at high
RPM
Engine Idles rough
Excessive vibration
Mower will not mulch grass
Uneven cut
Cause
1. PTO/Blade Engage knob engaged.
2. Parking brake not engaged.
3. Spark plug wire(s) disconnected.
4. Throttle control lever or Throttle/Choke
control lever not in correct starting position.
5. Choke not activated
6. Fuel tank empty, or stale fuel.
7. Blocked fuel line.
8. Faulty spark plug(s).
9. Engine flooded.
1. Tractor running with CHOKE activated.
2. Spark plug wire(s) loose.
3. Blocked fuel line or stale fuel.
4. Vent in gas cap plugged.
5. Water or dirt in fuel system.
6. Dirty air cleaner.
1. Engine oil level low.
2. Air flow restricted.
1. Spark plug(s) gap too close.
1. Spark plug(s) fouled, faulty or gap too wide.
2. Dirty air cleaner.
1. Cutting blade loose or unbalanced.
2. Damaged or bent cutting blade.
1. Engine speed too low.
2. Wet grass.
3. Excessively high grass.
4. Dull blade.
1. Deck not leveled properly.
2. Dull blade.
3. Uneven tire pressure.
Remedy
1. Place knob in disengaged (OFF) position.
2. Engage parking brake.
3. Connect wire(s) to spark plug(s).
4. Place throttle lever or Throttle/Choke control
lever to FAST position.
5. Pull the choke control or Throttle/Choke
control lever into the choke on position.
6. Fill tank with clean, fresh (less than 30 days
old) gas.
7. Clean fuel line and replace fuel filter.
8. Clean, adjust gap or replace plug(s).
9. Crank engine with throttle in FAST position.
1. Move the choke control or Throttle/Choke
control lever into the choke off position.
2. Connect spark plug wire(s).
3. Clean fuel line; fill tank with clean, fresh
gasoline and replace fuel filter.
4. Clear vent or replace cap if damaged.
5. Drain fuel tank. Refill with clean, fresh
gasoline.
6. Replace air cleaner paper element or clean
foam precleaner.
1. Fill crankcase with proper amount and
weight of oil.
2. Clean grass clippings and debris from around
the engine's cooling fins and blower housing.
1. Remove spark plug(s) and reset the gap.
1. Replace spark plug(s). Set plug gap.
2. Replace air cleaner element and/or clean
pre-cleaner.
1. Tighten blade and spindle.
2. Replace blade.
1. Place throttle in FAST (rabbit) position.
2. Do not mulch when grass is wet.
3. Mow once at a high cutting height, then
mow again at desired height or make a
narrower cutting swath.
4. Sharpen or replace blade.
1. Perform side-to-side deck adjustment.
2. Sharpen or replace blade.
3. Check tire pressure in all four tires.
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