Murray 20406X9A Lawn Mower Manual

The Murray 20406X9A is a 20-inch push lawn mower with a 6.75 HP Briggs & Stratton engine, featuring a single-lever height adjustment system, 3-in-1 mulching/bagging/side discharge capability, durable steel deck, easy-start system, and rear-wheel drive. Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Assembly Instructions 3. First-Time Setup 4. Specifications 5. Controls and Operation 6. Cutting Height Adjustment 7. Mulching & Bagging 8. Safety Features 9. Maintenance & Storage 10. Warranty Information 11. Troubleshooting

Features at a Glance

Key components: 6.75 HP Briggs & Stratton engine, 20-inch steel cutting deck, single-lever height adjustment, rear bagger, mulching plug, side discharge chute, and easy-grip handle.

Feature	Description
Engine	6.75 HP Briggs & Stratton 4-cycle engine
Cutting Width	20-inch steel deck
Height Adjustment	Single-lever system (6 positions: 1.5-3.75 inches)
Cutting Options	3-in-1: Mulch, Bag, Side Discharge
Drive System	Rear-wheel drive with traction control
Starting System	Easy-start recoil
Fuel Tank	1-quart capacity
Wheels	8-inch rear, 7-inch front
Handle	Adjustable, foldable for storage
Safety Features	Blade control lever, operator presence control

Assembly Instructions

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

Attach handle: Secure upper and lower handle sections with provided bolts.
Install wheels: Slide wheels onto axles and secure with retaining clips.
Attach grass bag: Hook bag onto rear deck brackets.
Install side discharge chute: Attach to discharge opening.
Add mulching plug: Insert into deck opening when mulching.
Check oil: Verify engine oil level before first use.

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

First-Time Setup

Before first mow, complete these steps.

Add oil: Fill with SAE 30 detergent oil (check dipstick).
Add fuel: Use fresh unleaded gasoline (no ethanol recommended).
Adjust cutting height: Set lever to desired position (middle setting recommended).
Test operation: Start engine in open area, engage blade control.
Check bagger: Ensure bag is properly attached and empty.

CAUTION! Never add fuel while engine is hot. Allow engine to cool for 5 minutes.

Specifications

Model: Murray 20406X9A
Engine: 6.75 HP Briggs & Stratton 4-cycle
Cutting Width: 20 inches
Cutting Height: 1.5 to 3.75 inches (6 positions)
Deck Material: Powder-coated steel
Wheels: 8-inch rear, 7-inch front
Fuel Capacity: 1 quart
Oil Capacity: 20 oz (SAE 30)
Weight: 65 lbs
Warranty: 2-year limited

Controls and Operation

Handle Controls: Blade control lever, drive control lever, height adjustment lever.

Starting: 1. Push primer bulb 3 times. 2. Set throttle to FAST. 3. Pull recoil starter firmly.

Stopping: Release blade control lever. Move throttle to STOP.

Driving: Squeeze drive control lever to engage rear-wheel drive.

Mowing Tips: Mow when grass is dry. Overlap passes by 2 inches. Change mowing pattern weekly.

Cutting Height Adjustment

Single-lever system adjusts all four wheels simultaneously.

Stop mower and disengage blade.
Pull lever outward and move to desired position (1-6).
Release lever to lock.
Test on small area before full mow.

Recommended Heights: Bermuda: 1.5-2 inches. Fescue: 2.5-3 inches. St. Augustine: 3-3.75 inches.

Mulching & Bagging

Mulching: Install mulching plug. Ensure blade is sharp. Mow at slower speed.

Bagging: Attach bag. Empty when bag indicator shows full.

Side Discharge: Install discharge chute. Use for tall/wet grass.

Tip: For best mulching, mow frequently and remove no more than 1/3 of grass height.

Safety Features

Blade Control Lever: Must be held to keep blade rotating. Operator Presence Control: Stops blade if lever released. Safety Labels: Read and understand all labels. Protective Footwear: Always wear while mowing.

WARNING! Never remove safety devices. Keep hands and feet away from cutting deck. Clear area of debris before mowing.

Maintenance & Storage

After Each Use: Clean deck, check for damage.

Monthly: Check blade sharpness, tire pressure, bolts.

Seasonal: Change oil, replace air filter, sharpen blade.

Storage: 1. Drain fuel or add stabilizer. 2. Clean thoroughly. 3. Store in dry place. 4. Remove spark plug and add oil to cylinder.

CAUTION! Disconnect spark plug before any maintenance.

Warranty Information

2-year limited warranty covering defects in materials/workmanship. Proof of purchase required. Does not cover normal wear, misuse, or lack of maintenance. For warranty service, contact Murray at 1-800-800-7310 or visit www.murray.com. Keep this manual for reference.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	No fuel, old gas, clogged air filter	Add fresh fuel, clean/replace air filter, check spark plug.
Poor cutting performance	Dull blade, low engine speed	Sharpen blade, set throttle to FAST, clean deck.
Uneven cut	Uneven tire pressure, bent blade	Inflate tires to 15 PSI, replace blade.
Excessive vibration	Loose blade, debris in deck	Tighten blade bolt, clean deck interior.
Loss of power	Dirty air filter, old fuel	Replace air filter, drain and refill with fresh gas.

Service: For repairs, use authorized service centers only.

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