MTD 111-120A Lawn Mower Manual

The MTD 111-120A is a reliable lawn mower designed for efficient grass cutting with a powerful engine, adjustable cutting height, and easy maneuverability. This manual provides essential information on safety, features, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Safety Information 3. Operation Instructions 4. Specifications 5. Maintenance 6. Troubleshooting

Features at a Glance

Key features include: 21-inch cutting deck, 3-in-1 cutting system (mulch, bag, side discharge), adjustable handle height, and a powerful 140cc engine.

FeatureDescription
Cutting Deck21-inch width for efficient mowing
Engine140cc engine for reliable performance
Cutting Height Adjustment6 positions for customized grass height
3-in-1 CapabilityMulch, bag, or side discharge clippings
Easy StartPull start mechanism for quick ignition

Safety Information

Always wear appropriate safety gear, including gloves and eye protection. Ensure the area is clear of debris before mowing.

  1. Read the manual before operation.
  2. Keep hands and feet away from the cutting blade.
  3. Do not operate on wet grass.
  4. Shut off the engine before servicing.

WARNING! Failure to follow safety instructions may result in injury.

Operation Instructions

To operate the mower, follow these steps:

  1. Check oil and fuel levels before starting.
  2. Adjust the cutting height as needed.
  3. Start the engine using the pull start.
  4. Guide the mower in a straight line for even cutting.

CAUTION! Do not leave the mower unattended while running.

Specifications

Maintenance

Regular maintenance is essential for optimal performance:

  1. Check and change the oil every 25 hours of use.
  2. Clean the air filter regularly.
  3. Sharpen the blade at least once a season.
  4. Inspect belts and cables for wear.

Tip: Store the mower in a dry place during off-season.

Troubleshooting

SymptomPossible CauseCorrective Action
Engine won't startFuel issueCheck fuel level and quality.
Uneven cuttingBlade dullSharpen or replace the blade.
Excessive vibrationLoose partsTighten all screws and bolts.
Grass clippings not baggingClogged chuteClear the discharge chute.

Service: For further assistance, contact MTD customer support.

MTD 111-120A Lawn Mower Manual © - All Rights Reserved 2026