Murray 405004x99A Lawn Mower Manual

The Murray 405004x99A 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, durable steel deck, easy-start system, and rear-wheel drive. 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 system, single-lever height adjustment, rear-wheel drive, foldable handle.

Assembly Instructions

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

1. Attach handle: Insert lower handle into deck brackets, secure with bolts.
2. Install upper handle: Connect to lower handle, secure knobs.
3. Attach grass bag: Hook bag frame onto rear deck brackets.
4. Install side discharge chute: Attach to discharge opening.
5. Add engine oil: Fill with SAE 30 detergent oil (20 oz).
6. Add gasoline: Use fresh unleaded gasoline (87 octane).

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

First-Time Operation

Before starting, complete pre-operation checks.

1. Check oil level: Ensure oil is at full mark.
2. Check fuel: Fill tank with fresh unleaded gasoline.
3. Inspect blade: Ensure blade is sharp and secure.
4. Adjust cutting height: Set lever to desired position.
5. Start engine: Insert safety key, set choke, pull starter cord.
6. Engage drive: Press drive control lever to handle.

CAUTION! Clear mowing area of debris. Do not operate on slopes over 15 degrees.

Specifications

• Model: Murray 405004x99A
• Engine: 190cc Briggs & Stratton 4-cycle
• Cutting Width: 21 inches
• Cutting Height: 6 positions (1.5-3.75 inches)
• Deck Material: Powder-coated steel
• Wheels: 8-inch rear, 7-inch front
• Drive: Rear-wheel drive
• Fuel Capacity: 1 quart
• Oil Capacity: 20 oz SAE 30
• Weight: 65 lbs

Controls and Settings

Handle controls: Drive control lever, height adjustment lever, engine stop lever.

Engine controls: Choke, throttle, primer bulb, recoil starter.

Height adjustment: Single lever adjusts all four wheels simultaneously. Drive system: Press lever to handle to engage rear wheels. Safety features: Blade control lever must be held to keep engine running. Engine stop: Release blade control lever or remove safety key.

Cutting Height Adjustment

Single-lever system with 6 cutting positions.

1. Stop engine and wait for blade to stop.
2. Pull height adjustment lever outward.
3. Move lever to desired position (1-6).
4. Release lever to lock position.

Tip: Cut no more than 1/3 of grass height at once. Adjust height seasonally.

Mulching & Bagging

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

1. Mulching: Install mulch plug in discharge opening.
2. Bagging: Attach grass bag to rear brackets.
3. Side discharge: Install discharge chute.
4. Select mode before starting engine.
5. Empty bag when 2/3 full for optimal performance.

WARNING! Always stop engine before changing cutting mode.

Safety Features

Blade control lever: Engine stops if released. Safety key: Must be inserted to start engine. Discharge guard: Prevents debris ejection. Handle safety: Foldable with locking mechanism.

Maintenance & Storage

Regular maintenance ensures optimal performance.

After each use: Clean underside of deck. Monthly: Check blade sharpness and balance. Seasonally: Change oil, clean/replace air filter, check spark plug. Storage: Drain fuel or add stabilizer, clean thoroughly, store in dry place.

CAUTION! Disconnect spark plug wire before performing maintenance.

Warranty Information

Limited 2-year warranty for residential use. Warranty covers defects in materials/workmanship. Not covered: commercial use, neglect, improper maintenance. For warranty claims, contact Murray customer service at 1-800-269-6215 or visit www.murray.com. Keep original receipt as proof of purchase.

Troubleshooting

Service: 1-800-269-6215; www.murray.com