MTD 135-420A Lawn Mower Manual

The MTD 135-420A is a reliable lawn mower designed for efficient grass cutting with a powerful engine, adjustable cutting height, and user-friendly controls. This manual provides essential information on safety, features, operation, maintenance, and troubleshooting to ensure optimal performance and longevity of your lawn mower.

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

Features at a Glance

Key features include a robust engine, adjustable cutting heights, and ergonomic handles for comfortable operation.

Feature	Description
Engine	Powerful 135cc engine for efficient cutting
Cutting Height Adjustment	5 adjustable heights for customized grass length
Grass Bag	Large capacity bag for easy grass collection
Ergonomic Handles	Comfortable grip for reduced fatigue
Safety Features	Blade brake and safety switch for user protection

Safety Information

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

Read the manual before operation.
Keep hands and feet away from the cutting area.
Do not operate in wet conditions.
Inspect the mower before each use.

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

Operation Instructions

To operate the MTD 135-420A, follow these steps:

Check fuel and oil levels before starting.
Adjust the cutting height as needed.
Start the engine using the ignition key.
Engage the blades and begin mowing.

CAUTION! Ensure the mower is on a stable surface before starting.

Specifications

Engine Type: 135cc 4-stroke engine.
Cutting Width: 21 inches.
Cutting Heights: 5 adjustable heights (1.5 to 4 inches).
Grass Bag Capacity: 1.5 bushels.
Weight: 60 lbs.
Fuel Type: Unleaded gasoline.
Oil Type: SAE 30 or 10W-30.

Maintenance

Regular maintenance is essential for optimal performance. Follow these guidelines:

Change the oil every 25 hours of operation.
Clean or replace the air filter regularly.
Sharpen the blades at the beginning of each season.
Inspect belts and cables for wear.

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

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	Fuel issues	Check fuel level and quality; ensure choke is set correctly.
Uneven cutting	Blade issues	Inspect and sharpen blades; check tire pressure.
Excessive vibration	Loose parts	Tighten all screws and bolts; inspect for damage.
Grass clippings not bagging	Clogged chute	Clear any debris from the chute.

Reset: If issues persist, consult a professional technician.