Murray MNA152702 Lawn Mower Manual

The Murray MNA152702 is a 3-in-1 walk-behind lawn mower featuring a 150cc Briggs & Stratton engine, 21-inch steel cutting deck, single-lever height adjustment (6 positions from 1.5" to 4"), 2-in-1 side discharge/mulching capability, optional bagging kit, rear-wheel drive, and durable polymer wheels. This manual covers safety, assembly, operation, maintenance, troubleshooting, and specifications.

1. Features at a Glance 2. Assembly Instructions 3. First-Time Setup 4. Specifications 5. Controls and Operation 6. Cutting & Discharge Options 7. Maintenance Schedule 9. Safety Features 10. Care & Storage 11. Warranty Information 12. Troubleshooting

Features at a Glance

Key components: 150cc Briggs & Stratton engine, 21-inch steel deck, single-lever height adjuster, rear-wheel drive system, 2-in-1 discharge chute, polymer wheels.

Feature	Description
Engine	150cc Briggs & Stratton 4-cycle, overhead valve
Cutting Width	21 inches
Cutting Height	6 positions (1.5" to 4")
Drive System	Rear-wheel drive with traction control
Discharge Options	Side discharge, mulching (2-in-1), optional bagging
Deck Material	Powder-coated steel
Wheels	8-inch polymer, ball bearing
Starting System	Recoil pull-start
Fuel Tank	0.5 gallon capacity
Weight	Approximately 65 lbs

Assembly Instructions

Unpack and inspect all parts. Assembly requires basic tools (included).

Attach handle: Align lower handle with deck brackets, secure with provided bolts and wrench.
Install discharge chute: Slide chute into deck opening, secure with wing nut.
Attach height adjuster lever: Connect to deck linkage, ensure smooth operation.
Install wheels: Slide axles through deck brackets, secure with washers and cotter pins.
Add engine oil: Fill with SAE 30 detergent oil (18 oz) before first use.

WARNING! Wear gloves during assembly. Ensure all fasteners are tight before operation.

First-Time Setup

Prepare mower for initial use.

Add fuel: Use fresh unleaded gasoline (87 octane minimum). Do not overfill.
Check oil level: Ensure oil is at full mark on dipstick.
Adjust cutting height: Set lever to desired position (recommend 3" for first mow).
Test controls: Engage safety handle, pull recoil starter to ensure smooth operation.
Select discharge mode: Install mulch plug for mulching, or leave chute open for side discharge.

CAUTION! Operate outdoors only. Keep area clear of bystanders during startup.

Specifications

Model: MNA152702
Engine: Briggs & Stratton 150cc, 4-cycle OHV
Cutting Width: 21 inches
Cutting Height Range: 1.5" - 4" (6 positions)
Deck Material: 20-gauge steel, powder-coated
Drive: Rear-wheel, ball-bearing wheels
Discharge: 2-in-1 side discharge/mulching
Bagging: Optional grass bag kit (sold separately)
Fuel Capacity: 0.5 gallon
Oil Capacity: 18 oz SAE 30
Weight: 65 lbs (approx.)

Controls and Operation

Primary controls: Safety handle, drive control lever, height adjuster, recoil starter.

Starting Procedure: 1. Check oil and fuel. 2. Move to open area. 3. Engage safety handle. 4. Pull recoil starter firmly. 5. Squeeze drive lever to move forward.

Height Adjustment: Single lever adjusts all four wheels simultaneously. Lift lever, move to desired position (1-6).

Drive Control: Squeeze lever against handle to engage drive; release to stop. Adjust speed by varying pressure.

Cutting & Discharge Options

Three cutting modes: Side discharge, mulching, bagging (with kit).

Side Discharge: Remove mulch plug; attach discharge chute. For normal cutting.
Mulching: Install mulch plug into deck opening. Cuts clippings finely for lawn nutrition.
Bagging: Install optional bagger kit; remove discharge chute and mulch plug.

Tip: For best mulching, mow when grass is dry and not too tall.

Maintenance Schedule

Regular maintenance ensures long life and optimal performance.

Interval	Task
Before each use	Check oil level, inspect for debris, test safety controls
Every 25 hours	Change engine oil, check air filter, inspect spark plug
Every season	Sharpen or replace blade, clean underside of deck, lubricate wheels
Storage	Drain fuel or add stabilizer, clean thoroughly, store covered

Blade Sharpening: Disconnect spark plug, remove blade, sharpen at 30-degree angle, balance before reinstalling.

Safety Features

Safety handle: Must be engaged for engine to run; releases to stop blade and engine. Blade brake system: Stops blade within 3 seconds when handle is released. Shielded discharge chute: Directs clippings downward. RIVETED steel deck: Provides durability and protection.

Care & Storage

Clean after each use. Store in dry location.

Allow engine to cool before storage.
Clean underside of deck with brush or hose (with engine off).
Wipe exterior with damp cloth.
For long-term storage: Drain fuel or add stabilizer, change oil, remove spark plug and add 1 tsp oil to cylinder.

CAUTION! Never store with fuel in tank indoors. Keep away from open flames.

Warranty Information

Murray MNA152702 comes with a 2-year limited warranty covering defects in materials and workmanship. Warranty does not cover normal wear, misuse, or lack of maintenance. For warranty service, contact Murray customer service at 1-800-XXX-XXXX or visit www.murray.com. Keep original receipt as proof of purchase.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	No fuel, old gas, clogged air filter	Add fresh fuel, clean/replace air filter, check spark plug.
Poor cutting performance	Dull blade, low engine speed	Sharpen/replace blade, check throttle setting.
Uneven cut	Uneven tire pressure, worn blade	Check tire inflation, balance or replace blade.
Excessive vibration	Loose blade, debris in deck	Tighten blade bolt, clean deck interior.
Loss of power	Dirty air filter, old fuel	Clean air filter, drain and replace fuel.

Service: For repairs, use authorized service centers. Always disconnect spark plug before maintenance.

Support: 1-800-XXX-XXXX; www.murray.com