Murray 7800889 Lawn Mower Manual

The Murray 7800889 is a 22-inch push lawn mower featuring a 190cc Briggs & Stratton engine, 3-in-1 mulching/bagging/side-discharge capability, single-lever height adjustment (6 positions: 1.5-3.75 inches), durable steel deck, easy-fold handle, and rear-wheel drive. Designed for residential lawns up to 1/2 acre. Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: 190cc Briggs & Stratton engine, 22-inch steel cutting deck, Rear bagger with 2.1-bushel capacity, Mulching plug, Side-discharge chute, Single-lever height adjustment, Foldable handle.

Assembly Instructions

Unpack and inspect all parts. Assembly requires adjustable wrench and screwdriver.

1. Attach Lower Handle: Bolt lower handle sections to deck using provided hardware.
2. Install Upper Handle: Connect upper handle to lower handle; secure knobs.
3. Attach Bagging System: Hook rear bagger frame to deck; attach fabric bag.
4. Install Side-Discharge Chute: Snap chute into opening on right side of deck.
5. Install Mulching Plug: Insert plug into rear discharge opening when mulching.
6. Add Engine Oil: Fill with SAE 30 detergent oil (20 oz. capacity).
7. Add Fuel: Use fresh unleaded gasoline (87 octane minimum).

WARNING! Do not add fuel or oil indoors. Keep away from sparks or flames.

First-Time Setup

Before first mow, complete pre-operation checks.

1. Check Oil Level: Ensure oil is at full mark on dipstick.
2. Check Tire Pressure: Inflate to 15 PSI (front) and 20 PSI (rear).
3. Adjust Cutting Height: Set lever to desired height (middle position recommended).
4. Test Controls: Ensure drive bail lever engages/disengages smoothly.
5. Start Engine: Pull starter cord firmly; allow engine to warm up 30 seconds.

CAUTION! Clear mowing area of stones, sticks, and debris before operation.

Specifications

• Model: Murray 7800889
• Engine: 190cc Briggs & Stratton 4-cycle OHV
• Cutting Width: 22 inches
• Cutting Height Range: 1.5 - 3.75 inches (6 positions)
• Deck: 22-inch steel, powder-coated
• Drive: Rear-wheel drive
• Bag Capacity: 2.1 bushels
• Wheel Size: 8-inch rear, 7-inch front
• Weight: 65 lbs (approx.)
• Fuel Type: Unleaded gasoline (87 octane min)
• Oil Type: SAE 30 detergent (20 oz. capacity)

Controls and Operation

Main Controls: Throttle lever (FAST/SLOW/STOP), Drive bail lever, Height adjustment lever, Recoil starter.

Starting Procedure:

1. Move throttle lever to FAST position.
2. Prime engine (3-4 presses if cold).
3. Pull starter cord firmly until engine starts.
4. Allow 30-second warm-up before mowing.

Stopping: Move throttle lever to STOP. Disconnect spark plug wire for storage.

Height Adjustment: Move single lever to one of 6 positions; ensure all wheels lock at same height.

Cutting & Discharge Options

3-in-1 System: Select mulch, bag, or side-discharge.

1. Mulching: Install mulching plug; grass clippings cut finely and returned to lawn.
2. Bagging: Attach rear bagger; collect clippings for disposal.
3. Side-Discharge: Install side chute; eject clippings to side (for tall/wet grass).

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

Maintenance Schedule

Regular maintenance ensures long life and safe operation.

Blade Sharpening: Disconnect spark plug. Remove blade; sharpen at 30-degree angle; balance before reinstalling.

Storage

Prepare mower for off-season storage.

1. Drain Fuel: Run engine until tank is empty, OR add fuel stabilizer.
2. Change Oil: Replace with fresh SAE 30 oil.
3. Clean Deck: Scrape off grass and debris; wash with water (not pressure washer).
4. Remove Spark Plug: Add 1 teaspoon oil into cylinder; pull starter slowly to coat.
5. Fold Handle: Lower handle for compact storage.
6. Store Indoors: Keep in dry, covered location.

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

Safety Information

Read all safety instructions before operation.

• Wear sturdy shoes, eye protection, and long pants.
• Clear mowing area of objects that could be thrown.
• Do not mow wet grass or on steep slopes (>15 degrees).
• Never remove grass bag or unclog chute with engine running.
• Disconnect spark plug before performing maintenance.
• Keep children and pets away from mowing area.
• Use outdoors only; exhaust contains carbon monoxide.

DANGER! Rotating blade can cause severe injury. Always ensure blade has stopped before crossing gravel drives or roads.

Warranty & Support

Limited 2-year warranty for residential use. Proof of purchase required. Warranty does not cover normal wear, misuse, or commercial use. For support, contact Murray Customer Service at 1-800-800-7310 or visit www.murray.com. Have model number (7800889) and serial number ready.

Troubleshooting

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