MTD 139-758-000 Lawn Mower Manual

The MTD 139-758-000 is a reliable lawn mower designed for efficient grass cutting and maintenance. It features a powerful engine, adjustable cutting heights, and a user-friendly design. Below are key sections for 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 components: 21-inch cutting deck, adjustable handle, mulching capability, and easy-start engine.

Feature	Description
Cutting Deck	21-inch wide for efficient mowing
Engine	Powerful 140cc engine for reliable performance
Adjustable Cutting Heights	7 height settings for customized grass length
Mulching Capability	Shreds grass clippings for nutrient recycling
Easy Start	Simple pull-start mechanism

Safety Information

Always wear appropriate safety gear, including gloves and eye protection. Read the manual thoroughly before operation.

WARNING! Keep hands and feet away from the cutting area while the mower is in operation.

Operation Instructions

To operate the mower, follow these steps:

Check oil and fuel levels before starting.
Adjust the handle to a comfortable height.
Start the engine using the pull-start mechanism.
Set the desired cutting height.
Begin mowing by pushing the mower forward.

CAUTION! Do not operate on wet grass to avoid slipping.

Specifications

Engine Type: 140cc 4-stroke.
Cutting Width: 21 inches.
Cutting Heights: 1 inch to 3.5 inches (7 settings).
Weight: 60 lbs.
Fuel Capacity: 1.5 quarts.
Deck Material: Steel.

Maintenance

Regular maintenance is essential for optimal performance:

Change the oil every 25 hours of operation.
Clean the air filter regularly.
Sharpen the blades at least once a season.
Inspect and replace spark plugs as needed.

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

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	Fuel issue	Check fuel level and quality; ensure choke is set correctly.
Uneven cutting	Blade issue	Sharpen or replace blades; check tire pressure.
Excessive vibration	Loose parts	Tighten all screws and bolts; inspect for damage.
Grass clippings not mulching	Blade dullness	Sharpen blades for better performance.

Service: For further assistance, contact MTD customer support.