Murray 405011x48A Lawn Mower Manual

The Murray 405011x48A is a 48-inch riding lawn mower featuring a powerful engine, hydrostatic transmission, electric start, 6-speed gear drive, adjustable cutting height, comfortable high-back seat, large capacity grass catcher, and durable steel deck. Designed for residential use on medium to large lawns. Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Assembly Instructions 3. First-Time Operation 4. Specifications 5. Controls and Settings 6. Attaching Accessories 7. Operating Procedures 8. Safety Features 10. Maintenance & Storage 11. Warranty Information 12. Troubleshooting

Features at a Glance

Key components: 48-inch steel cutting deck, Hydrostatic transmission, Electric start system, High-back seat, Grass collection bag, Engine controls, Parking brake.

Feature	Description
Cutting Width	48-inch steel cutting deck for wide coverage
Transmission	Hydrostatic drive for smooth speed control
Engine	Powerful OHV engine with electric start
Cutting Height	Adjustable from 1.5 to 4 inches in 0.5-inch increments
Seat	Padded high-back seat for operator comfort
Fuel Tank	Large capacity fuel tank for extended operation
Blade Engagement	Electric PTO clutch for blade control
Parking Brake	Mechanical parking brake for safety
Deck Wash Port	Connection for cleaning under deck
Headlights	Integrated headlights for low-light operation

Assembly Instructions

Unpack and inspect all parts. Assembly requires basic tools.

Install steering wheel: Align and secure with provided hardware.
Attach seat: Mount seat bracket and secure with bolts.
Install battery: Connect positive then negative terminals.
Attach cutting deck: Lower deck and secure with pins and belts.
Install grass bagger: Attach brackets and connect to discharge chute.

WARNING! Mower is heavy; use assistance during assembly. Ensure all bolts are properly tightened.

First-Time Operation

Complete pre-operation checks before starting engine.

Check engine oil: Ensure oil level is at full mark on dipstick.
Add fuel: Use fresh unleaded gasoline; fill to indicated level.
Check tire pressure: Inflate all tires to recommended PSI.
Adjust seat: Position for comfortable reach to all controls.
Start engine: Engage parking brake, set throttle, turn key to start.

CAUTION! Always operate on level ground. Keep hands and feet away from moving parts.

Specifications

Model: Murray 405011x48A
Cutting Width: 48 inches
Engine: 20 HP OHV, single cylinder
Transmission: Hydrostatic, infinite forward/reverse speeds
Cutting Height: 1.5 to 4 inches (adjustable)
Fuel Capacity: 3.5 gallons
Oil Capacity: 1.5 quarts (SAE 30)
Tire Size: Front 15x6.00-6, Rear 20x10.00-8
Weight: 550 lbs
Warranty: 2-year limited residential warranty

Controls and Settings

Operator station includes ignition, throttle, blade engagement, parking brake, and speed controls.

Dashboard: Ignition switch, Hour meter, PTO switch, Choke control, Throttle lever.

Steering: Tilt steering wheel for operator comfort.

Cutting Height: Adjust lever to desired height setting.

Speed Control: Hydrostatic pedal - forward pressure increases speed, reverse pressure moves backward.

Blade Control: Electric PTO switch engages cutting blades.

Attaching Accessories

Compatible with grass collection system and mulching kit.

Turn off engine and remove key before attaching accessories.
Grass bagger: Install brackets, attach bags to discharge chute.
Mulching kit: Remove discharge chute, install mulching plug.
Weight kit: For slopes, add wheel weights as specified.

Tip: Ensure all accessories are securely fastened before operation.

Operating Procedures

Follow proper mowing techniques for best results.

Starting: Engage parking brake, set throttle to choke, turn key.
Blade engagement: Move to open area, engage PTO switch.
Mowing patterns: Overlap each pass by 2-3 inches for even cut.
Slopes: Mow up and down slopes, not across. Avoid steep inclines.
Stopping: Disengage blades, return speed to neutral, engage parking brake.
Bagging: Monitor bag fill level; empty when full for optimal performance.
Mulching: Ensure grass is dry and not too tall for best mulching results.

WARNING! Never remove grass bag or discharge chute while blades are engaged. Keep bystanders away.

Safety Features

Operator Presence System: Engine stops if operator leaves seat with blades engaged. Blade Brake Clutch: Stops blades within 3 seconds when disengaged. Parking Brake: Mechanical brake for secure parking.

Maintenance & Storage

Regular maintenance ensures optimal performance and longevity.

Daily: Check tire pressure, clean deck, inspect blades.

Monthly: Check battery terminals, lubricate moving parts.

Seasonal: Change oil, replace air filter, sharpen blades.

Storage: Drain fuel or add stabilizer, clean thoroughly, store in dry location.

CAUTION! Always disconnect spark plug before performing maintenance. Allow engine to cool before servicing.

Warranty Information

2-year limited warranty for residential use. Warranty covers defects in materials and workmanship. Does not cover normal wear, improper maintenance, or commercial use. For warranty service, contact authorized Murray service center with proof of purchase. Keep this manual and receipt for warranty claims.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	Fuel, spark, battery	Check fuel level, spark plug connection, battery charge.
Poor cutting performance	Dull blades, deck clogged	Sharpen blades, clean under deck, adjust cutting height.
Excessive vibration	Unbalanced blade, loose parts	Check blade balance, tighten all bolts and fittings.
Loss of power	Clogged air filter, old fuel	Replace air filter, drain old fuel and refill with fresh.
Hydrostatic transmission issues	Low fluid, linkage adjustment	Check fluid level, adjust control linkage per manual.
Battery not charging	Loose connections, faulty alternator	Check battery terminals, test charging system.

Service: For technical support, contact Murray Customer Service at 1-800-800-7310 or visit www.murray.com