Murray 42586X9A Lawn Mower Manual

The Murray 42586X9A is a 21-inch push lawn mower featuring a 140cc Briggs & Stratton engine, 3-in-1 mulching/bagging/side-discharge capability, single-lever height adjustment (6 positions: 1.25-3.75 inches), durable steel deck, easy-start system, and large rear wheels for maneuverability. 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: 140cc Briggs & Stratton engine, 21-inch steel cutting deck, 3-in-1 function, single-lever height adjustment, rear bagger, mulch plug, and easy-fold handle.

Feature	Description
Engine	140cc Briggs & Stratton 450E series, 4-cycle
Cutting Width	21 inches
Cutting Height	6 positions (1.25" to 3.75")
Deck Material	Powder-coated steel
3-in-1 Function	Mulch, Bag, or Side-Discharge
Wheels	Large 8-inch rear, 7-inch front
Starting System	Recoil start with primer bulb
Handle	Fold-down for compact storage
Fuel Tank	0.5 gallon capacity
Weight	Approximately 55 lbs

Assembly Instructions

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

Attach Handle: Insert lower handle into deck brackets, secure with provided bolts and wing nuts.
Install Upper Handle: Connect upper handle section to lower handle, tighten knobs.
Attach Bagging System: Hook rear bagger onto deck brackets, ensure secure latch.
Install Mulch Plug: For mulching, insert mulch plug into rear discharge chute.
Add Engine Oil: Fill with SAE 30 detergent oil (check dipstick for level).
Add Fuel: Use fresh unleaded gasoline (87 octane minimum).

WARNING! Keep hands and feet clear of cutting blade during assembly. Wear gloves.

First-Time Setup

Before first use, complete pre-operation checks.

Check Oil Level: Ensure oil is at full mark on dipstick.
Fuel: Fill tank with fresh gasoline (do not overfill).
Blade Inspection: Verify blade is sharp and securely fastened.
Height Adjustment: Set cutting height to highest position for initial mow.
Start Engine: Prime 3 times, set choke, pull starter cord firmly.

CAUTION! Operate only in well-ventilated areas. Keep children and pets away.

Specifications

Model: Murray 42586X9A
Engine: Briggs & Stratton 450E, 140cc, 4-cycle
Cutting Width: 21 inches
Cutting Height Range: 1.25 - 3.75 inches (6 positions)
Deck: 21-inch steel, powder-coated
Wheels: 8-inch rear, 7-inch front
Fuel Capacity: 0.5 gallon
Oil Capacity: 20 oz (SAE 30)
Weight: 55 lbs (approx.)
Warranty: 2-year limited

Controls and Operation

Key controls: Primer bulb, choke lever, recoil starter, drive control bar, height adjustment lever.

Starting Procedure:

Push primer bulb 3 times (cold engine).
Set choke lever to FULL position.
Hold drive control bar to handle.
Pull starter cord briskly.
Move choke to RUN after engine starts.

Stopping: Release drive control bar; engine stops. For emergency, move throttle to STOP.

Cutting Height Adjustment

Single-lever adjustment for all four wheels.

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

Tip: For first mow of season or tall grass, use highest setting.

Mulching & Bagging

3-in-1 system: Configure for desired function.

Mulching: Install mulch plug in rear discharge. Grass is cut finely and returned to lawn.
Bagging: Attach rear bagger. Grass clippings collected for disposal.
Side-Discharge: Remove mulch plug and bagger. Grass discharged to side.

WARNING! Always stop engine before changing configuration. Wear gloves.

Safety Features

Drive control bar: Blade stops when released. Blade brake clutch: Stops blade while engine runs. Protective deck: Shields blade. Safety labels: Read and follow all instructions.

Maintenance & Storage

Regular maintenance ensures longevity.

After Each Use: Clean deck, check blade.
Monthly: Check oil level, air filter, blade sharpness.
Season End: Drain fuel or add stabilizer. Clean thoroughly. Store in dry place.

CAUTION! Disconnect spark plug before any maintenance. Never store with fuel in tank indoors.

Warranty Information

2-year limited warranty for residential use. Proof of purchase required. Coverage excludes normal wear, misuse, commercial use. For warranty service, contact Murray customer service at 1-800-800-7310 or visit www.murray.com. Keep manual for reference.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	No fuel, old gas, clogged filter	Add fresh fuel; check primer/choke; clean air filter.
Poor cutting performance	Dull blade, low engine speed	Sharpen or replace blade; check throttle setting.
Uneven cut	Uneven tire pressure, worn blade	Check tire pressure; level deck; balance blade.
Excessive vibration	Loose blade, bent blade	Stop engine; tighten blade bolt; replace if bent.
Bag not filling	Wet grass, clogged deck	Mow when dry; clean underside of deck.

Service: For repairs, use authorized service centers. Always use genuine Murray parts.

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