Murray 7800465 Lawn Mower Manual

The Murray 7800465 is a push lawn mower featuring 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.

Features at a Glance

Key components: Briggs & Stratton engine, 21-inch steel deck, rear bagger, height adjustment lever, recoil starter, drive control bar.

Feature	Description
Engine	Briggs & Stratton 125cc OHV engine
Cutting Width	21 inches
Cutting Deck	Durable steel construction
Cutting Options	Mulch, Bag, or Side Discharge
Height Adjustment	Single-lever, 6 positions (1.5-3.75 inches)
Drive System	Rear-wheel drive with drive control bar
Starter	Recoil easy-start system
Fuel Tank	1.0-quart capacity
Wheels	8-inch rear, 7-inch front
Weight	Approximately 60 lbs

Assembly Instructions

Unpack and inspect all parts. Assembly requires basic tools.

1. Attach handle: Align lower handle with deck brackets, secure with provided bolts.
2. Install upper handle: Connect to lower handle, tighten knobs.
3. Attach grass bag: Hook bag frame onto rear deck brackets.
4. Install side discharge chute (if not mulching): Snap into place on deck opening.
5. Add engine oil: Use SAE 30 detergent oil, fill to mark on dipstick.
6. Add gasoline: Use fresh unleaded gasoline (87 octane or higher).

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

Safety Precautions

Always follow safety guidelines to prevent injury.

1. Read manual completely before operation.
2. Clear mowing area of stones, toys, and debris.
3. Wear sturdy shoes, long pants, and eye protection.
4. Do not mow when children or pets are present.
5. Never remove grass catcher or discharge chute while engine is running.
6. Disconnect spark plug wire before performing maintenance.

CAUTION! Gasoline is flammable; fill tank outdoors, away from ignition sources.

Specifications

• Model: Murray 7800465
• Engine: Briggs & Stratton 125cc, 4-cycle
• Cutting Width: 21 inches
• Cutting Height: 1.5 to 3.75 inches (6 positions)
• Drive: Rear-wheel, self-propelled
• Deck Material: Steel
• Fuel Type: Unleaded gasoline (87 octane minimum)
• Oil Type: SAE 30 detergent (20 oz capacity)
• Warranty: 2-year limited

Controls and Operation

Familiarize yourself with controls before starting.

Controls: Recoil starter handle, throttle control, drive control bar, height adjustment lever, blade control bail.

Starting Procedure:

1. Check oil and fuel levels.
2. Push primer bulb 3 times (cold engine).
3. Set throttle to FAST position.
4. Hold blade control bail against handle.
5. Pull recoil starter firmly.

Stopping: Release blade control bail. Engine will stop; blade stops within 3 seconds.

Cutting Height Adjustment

Adjust all four wheels simultaneously with single lever.

1. Stop engine and wait for blade to stop.
2. Pull height adjustment lever outward.
3. Move lever to desired position (1=lowest, 6=highest).
4. Release lever to lock in position.

Tip: For first mow of season, set to highest setting. Never remove more than 1/3 of grass height at one time.

Maintenance Schedule

Regular maintenance ensures optimal performance and longevity.

Maintenance	Frequency
Check engine oil level	Before each use
Clean under deck	After each use
Check blade sharpness	Every 25 hours
Replace air filter	Every season or 25 hours
Change engine oil	First 5 hours, then every season
Replace spark plug	Every 100 hours
Lubricate wheels	Every season

WARNING! Always disconnect spark plug before servicing blade.

Storage Guidelines

Proper storage prevents fuel system issues.

1. Drain fuel tank or add fuel stabilizer.
2. Run engine for 2 minutes to circulate treated fuel.
3. Change oil if due.
4. Clean deck thoroughly.
5. Store in dry, covered area.
6. Remove spark plug and add 1 tablespoon oil to cylinder; pull starter slowly to distribute.

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

Warranty Information

Murray 7800465 includes 2-year limited warranty covering defects in materials/workmanship. Proof of purchase required. Does not cover normal wear, misuse, or lack of maintenance. For warranty service, contact authorized service center. Keep receipt and manual. For support, visit www.murray.com or call 1-800-800-7310.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	No fuel, old gas, clogged filter	Add fresh fuel; clean/replace air filter; check spark plug.
Engine runs poorly	Dirty air filter, bad gas	Replace air filter; drain and refill with fresh gas.
Uneven cutting	Dull blade, uneven tire pressure	Sharpen or replace blade; check tire pressure.
Mower vibrates excessively	Loose blade, bent blade	Tighten blade bolt; replace bent blade.
Self-propel not working	Drive cable loose, worn belt	Adjust drive cable; replace drive belt.
Grass not discharging	Wet grass, clogged deck	Wait for grass to dry; clean under deck.

Service: 1-800-800-7310; www.murray.com