Murray 7800325 Lawn Mower Manual

The Murray 7800325 is a walk-behind gas-powered lawn mower designed for residential use. It features a Briggs & Stratton engine, 21-inch steel cutting deck, single-lever height adjustment, rear bagging system, mulching capability, and side discharge option. Below are key sections for safety, features, assembly, operation, maintenance, troubleshooting, and specifications.

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 Instructions 9. Warranty Information 10. Troubleshooting

Features at a Glance

Key components: Briggs & Stratton engine, 21-inch steel deck, rear grass catcher, single-lever height adjustment, mulching plug, and recoil start.

Feature	Description
Engine	Briggs & Stratton 125cc 4-cycle gasoline engine
Cutting Width	21 inches
Cutting Deck	Steel construction with rust-resistant coating
Height Adjustment	Single-lever, 6 positions (1.5" to 3.5")
Grass Collection	Rear bag with 2.0 bushel capacity
Discharge Options	Rear bag, side discharge, or mulching
Start System	Recoil pull-start
Wheels	8-inch rear, 7-inch front plastic wheels
Handle	Folding with cushioned grip
Weight	Approximately 55 lbs

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 grass catcher: Attach bag support frame to rear deck; hang collection bag.
Attach discharge chute: Secure side discharge chute if not pre-installed.
Install mulching plug: For mulching operation, insert plug into discharge opening.
Add engine oil: Fill with SAE 30 detergent oil (check dipstick).
Add gasoline: Use fresh unleaded gasoline (87 octane minimum).

WARNING! Keep hands and feet clear of cutting blade during assembly. Ensure all fasteners are tight.

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: Never add gasoline while engine is running or hot.
Start safely: Stand behind mower, feet away from blade area when starting.
Operate carefully: Do not mow wet grass; watch for slopes and obstacles.
Keep bystanders away: Especially children and pets.
Disconnect spark plug: Before performing any maintenance or clearing blockages.

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

Specifications

Model: Murray 7800325
Engine: Briggs & Stratton 125cc, 4-cycle
Cutting Width: 21 inches
Cutting Height Range: 1.5" to 3.5" (6 positions)
Bag Capacity: 2.0 bushels
Deck Material: Steel
Wheels: 8" rear, 7" front
Fuel Tank Capacity: 0.5 gallons
Oil Capacity: 20 oz (SAE 30)
Weight: 55 lbs (approx.)

Controls and Operation

Handle Controls: Throttle lever, drive control bar, recoil starter grip.

Starting Procedure:

Check oil and fuel levels.
Move throttle lever to FAST position.
Prime engine (if equipped) by pressing primer bulb 3 times.
Pull recoil starter handle briskly.
Allow engine to warm up for 30 seconds.

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

Drive Control: Squeeze bar against handle to engage self-propelled drive (if equipped). Release to stop movement.

Cutting Height Adjustment

Single-lever adjustment: Move lever to desired position (1-6).

Stop engine and wait for blade to stop.
Pull height adjustment lever outward.
Move lever to desired cutting height position.
Release lever to lock in position.
Check all wheels are at same height.

Tip: For first mow of season, set to highest setting. Gradually lower for 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 100 hours or annually
Lubricate wheels and height adjuster	Every 25 hours
Check drive belt (if equipped)	Every 50 hours

CAUTION! Always disconnect spark plug wire before performing any maintenance.

Storage Instructions

Proper storage prevents fuel system issues and corrosion.

Drain or stabilize fuel: Run engine until fuel tank is empty, or add fuel stabilizer.
Change oil: Fresh oil prevents acid buildup during storage.
Clean thoroughly: Remove grass clippings from deck, wheels, and engine.
Protect blade: Apply light oil coating to prevent rust.
Store properly: Keep in dry, covered area away from moisture.
Remove battery (if electric start): Store separately in cool, dry place.

WARNING! Gasoline is flammable. Store mower away from heat sources and open flames.

Warranty Information

Murray 7800325 comes with a 2-year limited warranty covering defects in materials and workmanship. Warranty does not cover normal wear, misuse, or lack of maintenance. Proof of purchase required. For warranty service, contact authorized Murray service center or call 1-800-800-7310. Keep this manual and receipt for warranty claims.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	Empty fuel tank, stale fuel, clogged air filter	Add fresh gasoline, clean/replace air filter, check spark plug.
Engine runs poorly	Dirty air filter, old gasoline, water in fuel	Replace air filter, drain and refill with fresh fuel.
Uneven cutting	Dull blade, uneven tire pressure, incorrect height setting	Sharpen/balance blade, check tire pressure, adjust cutting height.
Excessive vibration	Loose blade, bent blade, debris under deck	Tighten blade bolt, replace bent blade, clean deck.
Grass not discharging	Wet grass, clogged deck, dull blade	Wait for grass to dry, clean deck, sharpen blade.
Self-propel not working	Drive belt worn or broken, control cable loose	Replace drive belt, adjust control cable tension.

Service: For technical support, call 1-800-800-7310 or visit www.murray.com