Murray 7800319 Lawn Mower Manual

The Murray 7800319 is a 21-inch push lawn mower featuring a 190cc Briggs & Stratton engine, 3-in-1 cutting system (mulch, bag, side discharge), single-lever height adjustment (6 positions from 1.5" to 4"), durable steel deck, easy-start system, and large-capacity rear bag. This manual covers safety, assembly, operation, maintenance, troubleshooting, and specifications to ensure proper and safe use of your mower.

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

Features at a Glance

Key components: 190cc Briggs & Stratton engine, 21-inch steel cutting deck, 3-in-1 system, single-lever height adjustment, rear grass bag, push handle with safety bail.

Feature	Description
Engine	190cc Briggs & Stratton, 4-cycle, OHV
Cutting Width	21 inches
Cutting System	3-in-1 (Mulch, Bag, Side Discharge)
Height Adjustment	Single lever, 6 positions (1.5" to 4")
Deck Material	Powder-coated steel
Starting System	Recoil start with primer bulb
Grass Bag Capacity	2.0 bushels (rear bag)
Wheels	8-inch rear, 7-inch front
Handle	Foldable, adjustable with safety bail
Weight	Approx. 65 lbs (unassembled)

Assembly Instructions

Unpack all parts and check against parts list. Assembly requires basic tools (included).

Attach Lower Handle: Bolt lower handle sections to deck using provided hardware.
Install Upper Handle: Connect upper handle to lower handle, secure with knobs.
Install Grass Bag: Attach bag support brackets to deck, hang bag on brackets.
Install Side Discharge Chute: If using side discharge, attach chute to deck opening.
Add Engine Oil: Fill engine with SAE 30 detergent oil (check dipstick).
Add Gasoline: Use fresh unleaded gasoline (87 octane or higher).

WARNING! Do not add gasoline during assembly. Keep away from sparks or flames.

Safety Information

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

Clear Area: Remove stones, sticks, wires, and debris from lawn.
Check Equipment: Ensure blade is sharp and securely fastened.
Start Safely: Stand behind mower, engage safety bail, pull starter cord.
Operate Safely: Push mower forward; do not pull backward or mow in reverse.
Stop Engine: Release safety bail to stop blade; wait for blade to stop before crossing gravel or roads.
Children/Pets: Keep clear of mowing area.

CAUTION! Never operate without grass bag, mulch plug, or side discharge chute properly installed.

Specifications

Model: Murray 7800319
Engine: Briggs & Stratton 190cc, 4-cycle, OHV
Cutting Width: 21 inches
Cutting Height: 1.5" to 4" (6 positions)
Deck: 21-inch steel, powder-coated
Cutting Options: Mulch, Bag, Side Discharge
Grass Bag Capacity: 2.0 bushels
Wheels: 8-inch rear, 7-inch front
Fuel Tank Capacity: 0.95 quarts
Oil Capacity: 20 oz (SAE 30)
Weight: Approx. 65 lbs (unassembled)

Controls and Operation

Handle Controls: Safety bail (must be held to run), height adjustment lever, fold knobs.

Starting Procedure:

Check oil and fuel levels.
Push primer bulb 3 times (cold engine).
Set throttle to FAST position.
Hold safety bail against handle.
Pull starter cord briskly.

Stopping: Release safety bail. Engine and blade will stop.

Height Adjustment: Move single lever to desired position (1-6).

Cutting System Setup

Configure for mulching, bagging, or side discharge.

Mulching: Install mulch plug (blocks discharge chute). Grass is cut finely and returned to lawn.
Bagging: Remove mulch plug, install grass bag on rear brackets.
Side Discharge: Remove mulch plug and bag, attach side discharge chute.

Tip: For best mulching, mow when grass is dry and not too tall.

Maintenance Schedule

Regular maintenance ensures long life and safe operation.

Maintenance	Frequency
Check engine oil level	Before each use
Check blade for sharpness/damage	Before each use
Clean underside of deck	After each use
Replace air filter	Every 25 hours
Change engine oil	Every 25 hours (first change after 5 hours)
Replace spark plug	Every 100 hours
Sharpen or replace blade	As needed (dull blade)

WARNING! Disconnect spark plug wire before performing any maintenance.

Storage Instructions

Prepare mower for off-season storage.

Drain Fuel: Run engine until it stops, or add fuel stabilizer.
Change Oil: Replace oil while engine is warm.
Remove Spark Plug: Add 1 tablespoon of oil into cylinder, pull starter slowly to coat, reinstall plug.
Clean Mower: Thoroughly clean deck, wheels, and handle.
Store Indoors: Keep in dry, covered location.

CAUTION! Gasoline left in tank over 30 days can cause starting problems.

Warranty Information

Murray 7800319 Lawn Mower is covered by a limited warranty. For residential use, the engine is warranted by Briggs & Stratton, and the mower components are warranted by Murray. Proof of purchase is required. For warranty service, contact an authorized Murray service dealer or call 1-800-800-7310. Visit www.murray.com for details.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	No fuel, old gas, clogged air filter, spark plug	Add fresh gas, clean/replace air filter, check spark plug.
Engine runs poorly	Dirty air filter, old gasoline	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, debris	Tighten blade bolt, replace bent blade, clean deck.
Grass not discharging properly	Wet grass, deck clogged, dull blade	Mow when dry, clean deck, sharpen blade.
Wheels not turning freely	Debris in axles, damaged wheels	Clean axles, replace damaged wheels.

Service: For repairs, use authorized Murray service centers. Engine service: Briggs & Stratton authorized dealers.

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