Murray PRO Series Lawn Mower Manual

The Murray PRO Series Lawn Mower is a robust, professional-grade mower designed for demanding residential and light commercial use. It features a powerful engine, durable steel deck, multiple cutting height adjustments, easy-start system, rear bagging or mulching capabilities, and ergonomic handles with safety controls. Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Assembly Instructions 3. Safety Information 4. Specifications 5. Controls and Operation 6. Cutting Height Adjustment 7. Maintenance Schedule 8. Storage Guidelines 9. Warranty Information 10. Troubleshooting

Features at a Glance

Key components: High-torque engine, Reinforced steel cutting deck, Rear collection bag, Height adjustment lever, Safety key, Blade engagement control, Fuel tank with gauge.

Feature	Description
Engine	Powerful Briggs & Stratton engine with easy-start system
Cutting Deck	21-inch reinforced steel deck for durability
Cutting Options	Rear bagging, side discharge, and mulching capability
Height Adjustment	Single-lever control for 6 cutting positions (1.5" - 4")
Drive System	Self-propelled rear-wheel drive with variable speed
Safety Features	Blade brake clutch, safety key, and operator presence control
Handle	Ergonomic folding handle with adjustable height
Fuel Tank	1.5-gallon capacity with visible fuel gauge
Wheels	Large 10-inch rear wheels for better traction
Warranty	2-year limited warranty for residential use

Assembly Instructions

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

Attach handle: Align handle brackets with deck mounts, secure with provided bolts and wrench.
Install grass bag: Attach bag support frame to rear deck, then hook collection bag onto frame.
Attach discharge chute: For side discharge option, secure chute to deck opening.
Install safety key: Insert into slot near control panel.
Add engine oil: Check manual for correct type and fill to indicated level.
Add fuel: Use fresh unleaded gasoline (87 octane minimum).

WARNING! Do not attempt to start mower before completing assembly and adding oil. Keep hands and feet clear of cutting blade during assembly.

Safety Information

Read all instructions before operating. Always wear appropriate safety gear.

Clear mowing area: Remove stones, toys, and other objects that could be thrown.
Check fuel: Never add fuel while engine is running or hot. Fill outdoors only.
Start safely: Ensure blade engagement control is disengaged. Pull cord firmly.
Operate carefully: Do not mow wet grass. Always mow across slopes, not up and down.
Stop engine: Disengage blade and wait for all moving parts to stop before leaving mower.
Children and pets: Keep them away from mowing area.

DANGER! The rotating blade can cause severe injury. Never place hands or feet under deck while engine is running.

Specifications

Engine: Briggs & Stratton 550 Series, 140cc
Cutting Width: 21 inches
Cutting Height: 6 positions, 1.5" to 4"
Drive System: Self-propelled, rear-wheel drive, variable speed
Deck Material: Reinforced steel
Fuel Capacity: 1.5 gallons
Oil Capacity: 20 oz. (SAE 30 detergent oil)
Wheel Size: 8" front, 10" rear
Collection Bag Capacity: 2.5 bushels
Weight: 75 lbs (approx.)

Controls and Operation

Control Panel: Located on upper handle. Includes: Engine throttle, Blade engagement lever, Drive control lever, Safety key slot, Primer bulb, Recoil starter.

Starting Procedure:

Insert safety key.
Move throttle to FAST position.
Press primer bulb 3 times (cold engine).
Pull recoil starter cord firmly.

Operating: To engage self-propelled drive, squeeze drive control lever to handle. To engage blade, squeeze blade engagement lever to handle. Release either lever to stop function.

Stopping: Release blade engagement lever, move throttle to STOP, remove safety key.

Cutting Height Adjustment

Single lever adjusts all four wheels simultaneously.

Stop engine and wait for blade to stop completely.
Pull height adjustment lever outward and move to desired position (1-6).
Release lever to lock into place.
Verify all wheels are at same height by checking deck level.

Tip: For first mow of season, set to highest position. Gradually lower to desired height over subsequent mows.

Maintenance Schedule

Regular maintenance ensures optimal performance and longevity.

Maintenance Task	Frequency
Check engine oil level	Before each use
Clean underside of deck	After each use
Check blade sharpness/balance	Every 25 hours
Replace air filter	Every season or 25 hours
Change engine oil	First 5 hours, then every 50 hours
Replace spark plug	Every season or 100 hours
Lubricate moving parts	Every 25 hours
Check drive belt tension	Every 50 hours

CAUTION! Always disconnect spark plug wire before performing any maintenance to prevent accidental starting.

Storage Guidelines

Proper storage prevents fuel system issues and corrosion.

Run engine to use remaining fuel, or add fuel stabilizer to full tank.
Change oil if due per maintenance schedule.
Clean entire mower, especially underside of deck.
Remove spark plug, add 1 tablespoon of oil to cylinder, pull starter cord slowly to distribute, reinstall plug.
Store in clean, dry place, protected from weather.
Cover with breathable fabric (do not use plastic).

WARNING! Never store mower with fuel in tank in enclosed area due to fire risk.

Warranty Information

Murray PRO Series mowers come with a 2-year limited warranty for residential use (90 days for commercial use). Warranty covers defects in materials and workmanship. Not covered: normal wear, improper maintenance, accident, misuse, or commercial use beyond 90 days. Proof of purchase required. For warranty service, contact authorized service center or call 1-800-MURRAY-1. Register your product online at www.murray.com/register.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	No fuel, clogged air filter, old spark plug, safety key not inserted	Check fuel level; clean/replace air filter; check/replace spark plug; ensure safety key is inserted.
Engine runs poorly	Dirty air filter, old fuel, water in fuel	Clean/replace air filter; drain and replace with fresh fuel.
Uneven cutting	Dull blade, uneven tire pressure, deck not level	Sharpen or replace blade; check tire pressure; adjust deck leveling.
Mower vibrates excessively	Loose blade, bent blade, unbalanced blade	Stop engine, disconnect spark plug, tighten blade bolt; replace if bent or unbalanced.
Self-propel not working	Drive belt worn or broken, drive control cable loose	Check drive belt for wear; adjust or replace drive control cable.
Grass not discharging	Wet grass, clogged deck, engine speed too low	Mow when grass is dry; clean underside of deck; run engine at full throttle.

Service: For repairs not covered in manual, contact authorized Murray service center at 1-800-MURRAY-1 or visit www.murray.com.