Murray 7800260 Lawn Mower Manual

The Murray 7800260 is a 21-inch, 3-in-1 push lawn mower featuring a 190cc Briggs & Stratton engine, rear bagging, side discharge, and mulching capabilities. It includes a single-lever height adjustment system (6 positions from 1.5" to 3.75"), durable steel deck, easy-start system, and a 2.5-bushel rear collection bag. Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: 190cc Briggs & Stratton engine, 21-inch steel cutting deck, 3-in-1 functionality (Bag, Mulch, Side Discharge), single-lever height adjustment, rear collection bag, and push handle with safety bail.

Assembly Instructions

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

1. Attach the lower handle: Secure to deck using provided bolts and washers.
2. Install the upper handle: Connect to lower handle, adjust height, and tighten knobs.
3. Attach the rear bag: Hook bag frame onto deck brackets; ensure secure fit.
4. Install side discharge chute (if not using bag/mulch): Snap into place on deck opening.
5. Insert mulching plug (for mulching mode): Place into rear discharge opening.
6. Check wheel height: Adjust all four wheels to same setting using single lever.
7. Add engine oil and gasoline: Use SAE 30 oil (20 oz) and unleaded gasoline.

WARNING! Do not add gasoline during assembly or indoors. Ensure all bolts are tightened securely.

First-Time Setup

Before first use, complete final checks and break-in procedure.

1. Check oil level: Ensure oil is at full mark on dipstick.
2. Add fuel: Fill tank with fresh unleaded gasoline (max 1 quart).
3. Prime engine: Press primer bulb 3 times for cold starts.
4. Set cutting height: Adjust lever to desired position (recommend 2.5" for first mow).
5. Select discharge mode: Install bag, side chute, or mulching plug as needed.
6. Break-in: Operate mower for first 5 minutes without load (no grass), then mow at half throttle for first hour.

CAUTION! Always operate outdoors in well-ventilated area. Keep hands and feet away from moving parts.

Specifications

• Model: Murray 7800260
• Engine: 190cc Briggs & Stratton 675 Series, 4-cycle
• Cutting Width: 21 inches
• Cutting Height Range: 1.5" - 3.75" (6 positions)
• Deck: 21-inch steel, powder-coated
• Discharge: 3-in-1 (Rear bag, side discharge, mulching)
• Bag Capacity: 2.5 bushels
• Wheels: 8" rear, 7" front
• Weight: 65 lbs (approx.)
• Fuel Tank: 1 quart capacity
• Oil Capacity: 20 oz SAE 30

Controls and Operation

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

Starting Procedure:

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

Stopping: Release safety bail to stop blade. Move throttle to STOP position to shut off engine.

Height Adjustment: Move single lever to one of 6 positions; all wheels adjust simultaneously.

Cutting & Discharge Options

Configure mower for desired cutting style.

1. Rear Bagging: Attach collection bag; ideal for collecting clippings.
2. Side Discharge: Install side chute; for cutting tall grass without bagging.
3. Mulching: Insert mulching plug; finely cuts clippings back into lawn.

Tip: For best mulching, mow when grass is dry and cut no more than 1/3 of grass height at once.

Maintenance Schedule

Regular maintenance ensures optimal performance and longevity.

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

Safety Features

Operator Presence Control: Safety bail stops blade within 3 seconds when released. Blade Brake Clutch: Engages when bail is released. Shielded Discharge: Keeps debris contained. RIVET™ Technology: Reinforced deck for durability.

Storage & Winterization

Prepare mower for off-season storage.

1. Run engine to burn remaining fuel in carburetor, or add fuel stabilizer.
2. Change oil while engine is warm.
3. Remove spark plug, add 1 tablespoon of oil into cylinder, pull starter cord slowly, reinstall plug.
4. Clean entire mower, especially underside of deck.
5. Sharpen or replace blade.
6. Store in dry, covered area, preferably off concrete floor.

CAUTION! Never store mower with gasoline in tank indoors or in enclosed spaces.

Warranty Information

Murray 7800260 includes a 2-year limited warranty for residential use. Warranty covers defects in materials and workmanship. Not covered: normal wear, misuse, lack of maintenance, commercial use. For warranty service, contact Murray customer service at 1-800-269-6215 or visit www.murray.com. Keep original receipt as proof of purchase.

Troubleshooting

Service: For technical support, call 1-800-269-6215 or visit www.murray.com.