Murray 425607x52A Lawn Mower Manual

The Murray 425607x52A is a 21-inch push lawn mower featuring a Briggs & Stratton 125cc gasoline engine, 3-in-1 cutting system (mulch, bag, side discharge), single-lever height adjustment for six cutting positions (1.5-3.5 inches), durable steel deck, easy-start system, and ergonomic handle with soft-grip. Designed for residential lawns up to 1/2 acre. Below are key sections for safety, features, assembly, operation, maintenance, troubleshooting, and specifications.

Features at a Glance

Key components: 21-inch steel cutting deck, Briggs & Stratton 125cc engine, 3-in-1 discharge system, single-lever height adjustment, rear grass bag, ergonomic handle.

Assembly Instructions

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

1. Attach Handle: Insert lower handle into deck brackets, secure with bolts and wing nuts.
2. Install Upper Handle: Connect upper handle to lower handle, tighten knobs.
3. Attach Grass Bag: Hook bag onto rear deck brackets; ensure secure fit.
4. Install Side Discharge Chute (if used): Attach to side discharge port.
5. Add Engine Oil: Fill with SAE 30 detergent oil (approx. 20 oz.) as per engine manual.
6. Add Gasoline: Use fresh unleaded gasoline (87 octane minimum).

WARNING! Wear gloves during assembly. Ensure all bolts are tight before operation.

First-Time Setup

Before first mow, complete pre-operation checks.

1. Check Oil Level: Ensure oil is at full mark on dipstick.
2. Check Gasoline: Fill tank with fresh unleaded gasoline.
3. Inspect Blade: Ensure cutting blade is sharp and securely fastened.
4. Adjust Cutting Height: Set lever to desired height (recommend 2.5" for first mow).
5. Select Discharge Mode: Install mulch plug, grass bag, or side discharge chute.
6. Start Engine: Prime bulb 3 times, set choke, pull starter cord firmly.

CAUTION! Operate only in well-ventilated areas. Keep hands and feet away from moving parts.

Specifications

• Model: Murray 425607x52A
• Engine: Briggs & Stratton 125cc, 4-cycle
• Cutting Width: 21 inches
• Cutting Heights: 6 positions, 1.5" - 3.5"
• Deck: 21-inch steel, powder-coated
• Discharge Options: Mulch, Bag (1.9 bu.), Side Discharge
• Wheels: 8" front, 10" rear plastic
• Weight: Approx. 55 lbs (without bag)
• Fuel Tank: 0.5 gallon
• Oil Capacity: 20 oz. SAE 30
• Warranty: 2-year limited

Controls and Operation

Handle Controls: Engine stop lever (deadman control), height adjustment lever.

Engine Controls: Primer bulb, choke lever, throttle control, recoil starter grip.

Starting Procedure: 1. Push primer bulb 3 times (cold engine). 2. Set choke to FULL. 3. Hold engine stop lever against handle. 4. Pull starter cord briskly. 5. Move choke to RUN after engine starts. Stopping: Release engine stop lever. For emergency stop, release lever immediately.

Cutting System & Height Adjustment

3-in-1 System: Install mulch plug for recycling clippings; attach bag for collection; use side discharge chute for directing clippings.

1. Select mode before starting engine.
2. Height Adjustment: Move single lever to one of six positions (1.5", 2", 2.5", 3", 3.25", 3.5").
3. For best results, never cut more than 1/3 of grass height at one time.

Tip: Keep blade sharp for clean cuts; sharpen or replace annually.

Maintenance Schedule

Regular maintenance ensures optimal performance and longevity.

1. Before Each Use: Check oil level, inspect blade for damage, clear deck of debris.
2. Every 25 Hours: Change engine oil (SAE 30), check air filter, inspect spark plug.
3. Every Season: Sharpen or replace blade, clean underside of deck, check wheel bolts.
4. Storage: Drain fuel or add stabilizer, change oil, clean thoroughly.

WARNING! Disconnect spark plug wire before performing any maintenance.

Storage & Winterization

Prepare mower for off-season storage.

1. Drain Fuel: Run engine until tank is empty, or add fuel stabilizer.
2. Change Oil: Drain old oil, refill with fresh SAE 30.
3. Remove Spark Plug: Add teaspoon of oil into cylinder, pull starter slowly, reinstall plug.
4. Clean: Wash deck, dry thoroughly, apply light oil to metal parts to prevent rust.
5. Store: Keep in dry, covered area; cover mower.

CAUTION! Gasoline left in tank can degrade and damage engine.

Safety Information

Read all instructions before operation. Wear safety glasses, long pants, and sturdy shoes.

DANGER! Keep hands and feet away from rotating blade. Never operate without grass bag, mulch plug, or discharge chute properly installed. Do not mow on steep slopes. Clear mowing area of stones, sticks, and debris. Never leave mower unattended with engine running. Keep children and pets away.

Warranty & Support

Murray 425607x52A includes a 2-year limited warranty covering defects in materials/workmanship. Warranty does not cover normal wear, misuse, or lack of maintenance. For warranty service, contact authorized service center with proof of purchase. For support, visit www.murray.com or contact 1-800-269-6215.

Troubleshooting

Reset: For engine safety switch issues, ensure stop lever is fully engaged.

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