Murray 7800261 Lawn Mower Manual

The Murray 7800261 is a 21-inch push lawn mower featuring a 190cc Briggs & Stratton engine, 3-in-1 mulching/bagging/side discharge capability, single-lever height adjustment (1.5-4 inches), durable steel deck, easy-start system, and large rear wheels for improved maneuverability. 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: 190cc Briggs & Stratton engine, 21-inch steel cutting deck, 3-in-1 discharge system, single-lever height adjustment, rear-wheel drive, and foldable handle.

Feature	Description
Engine	190cc Briggs & Stratton 4-cycle engine
Cutting Width	21 inches
Cutting Options	Mulch, Bag, Side Discharge
Height Adjustment	Single-lever, 6 positions (1.5-4 inches)
Drive System	Rear-wheel drive with large 8-inch wheels
Deck Material	Durable powder-coated steel
Starter System	Easy-pull recoil start
Fuel Tank Capacity	1.0 quart (0.95 liters)
Handle	Foldable for compact storage
Weight	Approximately 65 lbs (29.5 kg)

Assembly Instructions

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

Attach handle: Secure upper handle to lower handle using provided bolts and wing nuts.
Install wheels: Slide wheels onto axles and secure with retaining clips.
Attach discharge chute: Align chute with deck opening and secure with provided hardware.
Install grass bag: Attach bag support frame and hook bag onto rear deck.
Add engine oil: Fill with SAE 30 detergent oil (check dipstick for proper level).
Add gasoline: Use fresh unleaded gasoline (87 octane or higher).

WARNING! Always wear gloves during assembly. Ensure all bolts are tightened securely.

Safety Information

Read all instructions before operating. Always follow safety guidelines.

Clear mowing area: Remove stones, toys, and other objects that could be thrown.
Wear proper attire: Safety glasses, long pants, and sturdy shoes.
Never operate barefoot or in sandals.
Keep children and pets away from mowing area.
Stop engine before unclogging discharge chute or making adjustments.
Never refuel while engine is hot or running.
Use mower only in daylight or good artificial light.

CAUTION! Gasoline is flammable. Store fuel in approved container away from heat sources.

Specifications

Model: Murray 7800261
Engine: Briggs & Stratton 190cc, 4-cycle
Cutting Width: 21 inches
Cutting Height Range: 1.5 to 4 inches (6 positions)
Wheel Size: 8-inch rear, 7-inch front
Deck Material: Powder-coated steel
Discharge Options: Mulch, Bag, Side Discharge
Fuel Type: Unleaded gasoline (87 octane minimum)
Oil Type: SAE 30 detergent oil (20 oz capacity)
Warranty: 2-year limited warranty

Controls and Operation

Main controls: Engine control lever, drive control bar, height adjustment lever.

Starting Procedure:

Check oil and fuel levels.
Push primer bulb 3 times (cold engine).
Set engine control lever to START position.
Pull recoil starter handle firmly.
Move engine control lever to RUN position.

Stopping Procedure: Release drive control bar and move engine control lever to STOP position.

Drive Control: Squeeze drive control bar against handle to engage drive system.

Cutting Height Adjustment

Single-lever adjustment for all four wheels simultaneously.

Stop engine and wait for blades to stop completely.
Pull height adjustment lever outward and move to desired position.
Release lever to lock in position.
Positions range from 1.5" (lowest) to 4" (highest).

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

Maintenance Schedule

Regular maintenance ensures optimal performance and longevity.

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

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

Storage Guidelines

Proper storage prevents fuel system issues and corrosion.

Drain fuel tank or add fuel stabilizer.
Run engine until it stops to clear carburetor.
Change engine oil at end of season.
Clean entire mower, especially under deck.
Sharpen and balance blade.
Store in dry, covered area.
Remove spark plug and add 1 oz of oil to cylinder; pull starter slowly to distribute.

CAUTION! Never store mower with fuel in tank indoors or near open flame.

Warranty Information

Murray 7800261 comes with a 2-year limited warranty covering defects in materials and workmanship. Warranty does not cover normal wear, improper maintenance, or commercial use. Keep original receipt as proof of purchase. For warranty service, contact authorized Murray service center or call 1-800-800-7310. Visit www.murray.com for complete warranty terms and service locations.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	No fuel, old gasoline, clogged air filter	Add fresh fuel, clean/replace air filter, check spark plug.
Engine runs poorly	Dirty air filter, old gasoline	Replace air filter, drain and add fresh gasoline.
Uneven cutting	Dull blade, uneven tire pressure	Sharpen blade, check tire pressure (12-15 PSI).
Mower vibrates excessively	Damaged or unbalanced blade	Replace or balance blade, check for bent crankshaft.
Won't drive properly	Drive belt worn or loose	Adjust or replace drive belt.
Grass not discharging	Wet grass, clogged deck	Clean under deck, mow when grass is dry.
Engine overheats	Dirty cooling fins, low oil	Clean cooling fins, check oil level.

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