Murray 7800259 Lawn Mower Manual

The Murray 7800259 is a walk-behind gas-powered lawn mower designed for residential use. It features a Briggs & Stratton engine, 21-inch steel cutting deck, 3-in-1 mulching/bagging/side discharge capability, single-lever height adjustment, easy-start system, and durable rear-wheel drive. 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: Briggs & Stratton engine, 21-inch steel deck, rear bagger, mulching plug, side discharge chute, single-lever height adjustment, rear-wheel drive system.

Feature	Description
Engine	Briggs & Stratton 125cc OHV engine with easy-start system
Cutting Width	21-inch steel cutting deck
Cutting Options	3-in-1: Mulch, Bag, or Side Discharge
Height Adjustment	Single-lever adjusts all four wheels (6 positions)
Drive System	Rear-wheel drive for better traction
Fuel Tank	1-quart capacity, unleaded gasoline only
Starter	Recoil pull-start mechanism
Wheels	8-inch rear, 7-inch front plastic wheels
Handle	Foldable for easy storage
Bag Capacity	1.8 bushel rear bagger

Assembly Instructions

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

Attach handle: Secure upper and lower handle sections with provided bolts and wing nuts.
Install wheels: Slide wheels onto axles and secure with retaining clips.
Attach grass bag: Hook bag frame onto deck brackets; ensure bag is properly seated.
Install side discharge chute: If using side discharge, attach chute to deck opening.
Add oil and fuel: Fill engine with SAE 30 oil (check dipstick); add unleaded gasoline.

WARNING! Keep hands clear of cutting blade during assembly. Wear gloves.

Safety Information

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

Clear mowing area: Remove stones, toys, and other objects that could be thrown.
Check fuel: Fill outdoors, away from ignition sources; wipe spills immediately.
Start safely: Ensure drive control is disengaged; stand behind mower when starting.
Operate carefully: Do not mow wet grass; watch for slopes and obstacles.
Stop engine: Disengage blade and wait for all moving parts to stop before maintenance.

CAUTION! Never leave mower unattended while engine is running. Keep children and pets away.

Specifications

Model: Murray 7800259
Engine: Briggs & Stratton 125cc, 4-cycle OHV
Cutting Width: 21 inches
Cutting Height: 1.5 to 3.75 inches (6 positions)
Deck Material: Powder-coated steel
Wheels: 8-inch rear, 7-inch front
Drive: Rear-wheel drive
Fuel Type: Unleaded gasoline (87 octane or higher)
Oil Type: SAE 30 (summer), 5W-30 (winter)
Weight: 55 lbs (approx.)

Controls and Operation

Handle controls: Drive control bar, height adjustment lever, engine stop cable.

Starting: 1. Check oil and fuel. 2. Prime engine (if equipped). 3. Set throttle to FAST. 4. Pull recoil starter firmly.

Stopping: Release drive control bar; move throttle to STOP; wait for blade to stop.

Operation: Squeeze drive control bar to engage drive; release to stop. Adjust speed with throttle. For bagging: attach bag. For mulching: install mulch plug. For side discharge: attach chute.

Cutting Height Adjustment

Single-lever adjusts all four wheels simultaneously.

Stop engine and wait for blade to stop.
Pull lever outward and move to desired height position (1=lowest, 6=highest).
Release lever to lock in position.
Test on a small area before full mowing.

Tip: For first mow of season, set to highest setting; gradually lower for subsequent mows.

Maintenance Schedule

Regular maintenance ensures optimal performance and longevity.

Interval	Task
Before each use	Check oil level; inspect blade for damage; clear deck of debris
Every 25 hours	Change engine oil; clean or replace air filter
Every season	Sharpen or replace blade; check spark plug; lubricate wheels
Storage	Drain fuel or add stabilizer; clean underside of deck

WARNING! Disconnect spark plug wire before performing any maintenance.

Storage Guidelines

Proper storage prevents corrosion and starting issues.

Clean mower thoroughly, especially underside of deck.
Drain fuel tank or add fuel stabilizer and run engine for 5 minutes.
Change oil if due.
Store in dry, covered area away from moisture and direct sunlight.
Remove spark plug and add teaspoon of oil to cylinder; pull starter slowly to coat.

CAUTION! Never store mower with fuel in tank indoors without stabilizer.

Warranty Information

Murray 7800259 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 filter	Check fuel level; use fresh gas; clean/replace air filter.
Engine runs poorly	Dirty spark plug, old oil	Clean or replace spark plug; change engine oil.
Uneven cutting	Dull blade, uneven tire pressure	Sharpen or balance blade; check tire pressure.
Mower vibrates excessively	Bent blade, loose parts	Inspect blade for damage; tighten all bolts and nuts.
Won't drive	Drive cable loose, belt worn	Adjust drive cable tension; inspect drive belt.

Service: For technical support, call 1-800-XXX-XXXX or visit www.murray.com.