Murray F4315-120 Lawn Mower Manual

The Murray F4315-120 is a 120-Volt Electric Lawn Mower designed for residential use, featuring a 20-inch cutting deck, adjustable cutting height, push-button start, cord retention system, lightweight design, and a durable steel deck. Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Assembly Instructions 3. Safety Precautions 4. Specifications 5. Controls and Operation 6. Cutting Height Adjustment 7. Maintenance & Storage 8. Blade Care & Sharpening 9. Cord Management 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: 20-inch steel cutting deck, electric motor, height adjustment lever, push-button power switch, cord retention hook, grass collection bag, and rear discharge chute.

Feature	Description
Cutting Width	20 inches
Power Source	120V AC electric motor
Start Type	Push-button electric start
Cutting Height Adjustment	Single lever, 6 positions (1-3 inches)
Deck Material	Powder-coated steel
Discharge Options	Rear bagging and side discharge
Cord Retention	Integrated hook to manage power cord
Wheels	8-inch rear, 7-inch front
Weight	Approximately 35 lbs
Warranty	2-year limited warranty

Assembly Instructions

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

Attach handle: Align handle with deck brackets, insert bolts, and tighten securely.
Install grass bag: Attach bag holder to rear deck, slide collection bag into frame.
Attach discharge chute: Secure side discharge chute if not pre-installed.
Install wheels: Slide axles through wheel hubs, secure with provided clips.
Adjust cutting height: Set lever to highest position before first use.

WARNING! Ensure mower is unplugged during assembly. Tighten all fasteners to prevent loosening during operation.

Safety Precautions

Read all instructions before operating. Always follow basic electric mower safety.

Power cord: Inspect for damage before each use. Keep cord away from cutting area.
Clear area: Remove stones, toys, and debris from lawn before mowing.
Dry conditions only: Do not operate in wet grass or rain.
Wear protection: Use safety glasses, sturdy shoes, and long pants.
Keep bystanders away: Especially children and pets.
Disconnect power: Unplug before clearing blockages, adjusting, or performing maintenance.

DANGER! Risk of electric shock. Do not expose mower to moisture. Never carry mower while plugged in.

Specifications

Model: Murray F4315-120
Type: Electric Push Lawn Mower
Cutting Width: 20 inches
Cutting Heights: 6 positions, 1" to 3"
Motor: 120V, 12 Amp
Deck: Steel, powder-coated
Wheels: 8" rear, 7" front
Weight: 35 lbs (approx.)
Collection Bag Capacity: 1.8 bushels
Power Cord: 100-foot maximum recommended extension cord (16-gauge minimum)

Controls and Operation

Front Panel: Power switch (ON/OFF), Handle with safety bail. Operation Steps:

Plug into grounded outdoor outlet. Use cord retention hook to manage slack.
Press and hold safety bail against handle.
Press power switch to ON position.
Push mower forward at a steady pace. Do not force.
To stop: Release safety bail—blade stops within 3 seconds. Turn power switch OFF and unplug.

Tip: Mow in overlapping passes for even cutting. Avoid cutting more than 1/3 of grass height at once.

Cutting Height Adjustment

Adjust all four wheels simultaneously with single lever.

Stop mower, release bail, turn off, and unplug.
Pull height adjustment lever outward and move to desired position (1-6).
Release lever to lock into place.
Check that all wheels are at same height.

Recommended: Higher setting for rough/uneven terrain; lower for fine lawns.

Maintenance & Storage

Regular maintenance ensures optimal performance and longevity.

After each use: Clean underside of deck (unplugged).
Monthly: Check blade for sharpness and damage.
Seasonal: Lubricate wheel axles and height adjustment mechanism.
Storage: Store in dry, covered area. Empty grass bag. Coil cord neatly.

CAUTION! Always disconnect power before any maintenance. Do not use water to clean electrical components.

Blade Care & Sharpening

A sharp blade ensures clean cut and healthy grass.

Unplug mower. Tip mower on side (air filter side up).
Block blade with wood piece to prevent rotation. Remove blade bolt (clockwise threads).
Inspect for cracks or excessive wear. Replace if damaged.
Sharpen with file or bench grinder, maintaining original angle. Balance blade (use balancer).
Reinstall blade with cutting edge toward deck. Tighten bolt securely (40-50 ft-lbs).

WARNING! Wear heavy gloves. Replace blade every 2 seasons or if damaged. Unbalanced blade causes vibration.

Cord Management

Proper cord handling prevents damage and tripping hazards.

Use outdoor-rated extension cord, 16-gauge minimum for up to 100 feet.
Plug mower cord into extension cord first, then into outlet.
Route cord away from cutting path using retention hook.
Always mow away from cord. Do not run over cord.
Inspect cord regularly for cuts, frays, or exposed wires.

DANGER! Do not use damaged cords. Keep connections dry and off ground.

Regulatory Information

This product complies with applicable U.S. safety standards. Electric motor meets UL standards. Contains no user-serviceable parts inside motor housing. Copyright © Murray LLC. For support, visit www.murray.com or contact 1-800-XXX-XXXX. Dispose of according to local regulations; recycle where possible.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Mower won't start	No power, safety bail not engaged	Check outlet; reset GFCI; plug in securely; press bail fully.
Motor runs but blade doesn't turn	Shear pin broken	Unplug; replace shear pin (see parts diagram).
Uneven cutting	Dull blade, uneven tire pressure	Sharpen/replace blade; check tire pressure (20 PSI).
Excessive vibration	Unbalanced/damaged blade, debris	Stop, unplug, inspect blade; clean deck; balance blade.
Mower stops during operation	Overloaded motor, extension cord too long/thin	Reduce cutting height; mow slower; use proper cord gauge.
Poor grass collection	Wet grass, full bag, clogged chute	Mow when dry; empty bag; clear chute (unplugged).

Reset: If motor overheats, unplug and wait 15 minutes to cool.

Service: For electrical or motor issues, contact authorized service center: 1-800-XXX-XXXX; www.murray.com