Murray MD20475FC Lawn Mower Manual

The Murray MD20475FC is a 20-inch, 4.75 horsepower, front-wheel drive push lawn mower featuring a Briggs & Stratton engine, 3-in-1 discharge system (mulch/bag/side discharge), single-lever height adjustment, durable steel deck, and easy-start system. Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Assembly Instructions 3. Safety Information 4. Specifications 5. Controls and Operation 6. Height Adjustment 7. 3-in-1 Discharge System 8. Maintenance Schedule 9. Storage & Winterization 10. Warranty Information 11. Troubleshooting

Features at a Glance

Key components: Briggs & Stratton engine, steel cutting deck, front-wheel drive system, single-lever height adjustment, 3-in-1 discharge system, grass bag, and operator controls.

Feature	Description
Engine	Briggs & Stratton, 4.75 HP, 140cc, easy-start system
Cutting Width	20 inches
Drive System	Front-wheel drive for better traction
Cutting Height	Single-lever adjustment (1.5 to 3.75 inches)
Discharge System	3-in-1 (mulch, bag, side discharge)
Deck Material	Durable steel construction
Wheels	8-inch front, 8-inch rear
Fuel Tank	1-quart capacity
Starter	Recoil start
Weight	Approximately 60 lbs

Assembly Instructions

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

Attach handle: Secure upper and lower handle sections with provided bolts and washers.
Install grass bag: Attach bag support brackets to deck, then hook bag onto brackets.
Install discharge chute: For side discharge, attach chute to deck opening.
Add engine oil: Fill with SAE 30 detergent oil (check dipstick).
Add fuel: Use fresh unleaded gasoline (no more than 10% ethanol).

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

Safety Information

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

Clear mowing area: Remove stones, toys, and other objects.
Check equipment: Ensure all parts are properly installed and secure.
Use proper attire: Wear sturdy shoes, long pants, and eye protection.
Never mow wet grass: Can cause slipping and poor cutting performance.
Disconnect spark plug: Before performing any maintenance or clearing blockages.

DANGER! Keep hands and feet away from moving parts. Never allow children to operate.

Specifications

Model: MD20475FC
Engine: Briggs & Stratton, 4.75 HP, 140cc, OHV
Cutting Width: 20 inches
Cutting Heights: 1.5" to 3.75" (6 positions)
Drive: Front-wheel drive
Wheel Size: 8 inches (front and rear)
Deck Material: Steel
Discharge: 3-in-1 (mulch, bag, side discharge)
Fuel Capacity: 1 quart
Oil Capacity: 20 oz (SAE 30)
Weight: 60 lbs (approx.)

Controls and Operation

Main controls: Drive control bar, engine throttle, recoil starter, height adjustment lever.

Starting Procedure:

Check oil and fuel levels.
Move throttle to FAST position.
Prime engine (if equipped) by pressing primer bulb 3 times.
Pull recoil starter firmly.

Stopping: Release drive control bar, move throttle to STOP, disconnect spark plug for storage.

Drive Control: Squeeze bar against handle to engage drive wheels; release to stop.

Height Adjustment

Single-lever adjustment for all four wheels simultaneously.

Stop mower and engine.
Pull height adjustment lever outward.
Move lever to desired height setting (1.5" to 3.75").
Release lever to lock in position.

Tip: For first cut of season, set to highest setting. Lower gradually for subsequent cuts.

3-in-1 Discharge System

Configure for mulching, bagging, or side discharge.

Mulching: Install mulch plug (closes discharge opening).
Bagging: Remove mulch plug, attach grass bag.
Side Discharge: Remove mulch plug and bag, attach discharge chute.

Note: Always stop engine before changing discharge configuration.

Maintenance Schedule

Maintenance	Frequency	Procedure
Check oil level	Before each use	Use dipstick; add SAE 30 if low
Clean underside of deck	After each use	Scrape with putty knife (engine off)
Sharpen blade	Every 25 hours	Remove blade, sharpen at 30° angle
Replace air filter	Every season	Remove cover, replace foam filter
Change oil	Every season or 50 hours	Drain old oil, refill with 20 oz SAE 30
Replace spark plug	Every 100 hours	Use Champion RC12YC gap .030"

Storage & Winterization

Proper storage extends mower life.

Drain fuel: Run engine until tank is empty, or add fuel stabilizer.
Change oil: Replace with fresh SAE 30 oil.
Clean thoroughly: Remove grass clippings from deck and underside.
Store indoors: Keep in dry, covered area.
Remove spark plug: Add teaspoon of oil to cylinder, pull starter slowly to coat.

CAUTION! Never store with fuel in tank for more than 30 days without stabilizer.

Warranty Information

Murray mowers come with a limited warranty. Residential use: 2-year limited warranty. Commercial use: 90-day limited warranty. Warranty covers defects in materials and workmanship. Not covered: normal wear, misuse, neglect, improper maintenance. For warranty service, contact authorized service center with proof of purchase. For support, visit www.murray.com or call 1-800-800-7310.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	No fuel, old gas, clogged filter	Add fresh fuel; check fuel line; clean/replace air filter
Engine runs poorly	Dirty air filter, old fuel	Clean/replace air filter; drain and add fresh gas
Uneven cutting	Dull blade, uneven tire pressure	Sharpen or replace blade; check tire pressure
Mower vibrates excessively	Loose blade, debris under deck	Tighten blade bolt; clean underside of deck
Wheels not driving	Drive cable loose or broken	Adjust or replace drive cable
Grass not discharging	Wet grass, clogged deck	Mow when grass is dry; clean deck

Service: For repairs, use authorized Murray service centers. Always disconnect spark plug before servicing.

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