Murray 309008x92B Lawn Mower Manual

The Murray 309008x92B is a 20-inch push lawn mower featuring a 159cc Briggs & Stratton engine, 3-in-1 mulching/bagging/side-discharge capability, 6-position single-lever height adjustment, durable steel deck, easy-start system, and rear-wheel drive. This manual covers safety instructions, assembly, operation, maintenance, troubleshooting, and storage procedures to ensure optimal performance and longevity of your mower.

Features at a Glance

Key components: 159cc Briggs & Stratton engine, 20-inch steel cutting deck, 3-in-1 function (mulch/bag/side-discharge), rear-wheel drive, single-lever height adjustment, foldable handle, and grass bag with indicator.

Assembly Instructions

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

1. Attach handle: Insert lower handle into deck brackets, secure with provided bolts and wing nuts.
2. Install wheels: Slide wheels onto axles, secure with retainer clips or washers and nuts.
3. Attach grass bag: Hook bag frame onto rear deck brackets; ensure secure attachment.
4. Install side-discharge chute (if not pre-installed): Align with deck opening, secure with wing nut.
5. Add engine oil: Use SAE 30 detergent oil (approx. 20 oz.) – check dipstick for proper level.
6. Add gasoline: Use fresh unleaded gasoline (87 octane minimum) – fill tank to indicated level.

WARNING! Do not attempt to start engine before adding oil and gasoline. Keep hands and feet clear of moving parts during assembly.

Safety Precautions

Always follow safety guidelines to prevent injury or damage.

1. Read manual thoroughly before operation.
2. Clear mowing area of stones, sticks, and debris.
3. Wear sturdy shoes, long pants, and eye protection.
4. Do not mow wet grass or in poor lighting.
5. Keep children and pets away from mowing area.
6. Disconnect spark plug wire before performing maintenance.
7. Never leave mower unattended with engine running.
8. Use extreme caution on slopes; mow across slopes, not up and down.

CAUTION! Gasoline is flammable; store in approved container away from heat sources. Engine and muffler become hot during use; allow to cool before touching.

Specifications

• Model: Murray 309008x92B
• Engine: Briggs & Stratton 450E series, 159cc, OHV
• Cutting Width: 20 inches
• Cutting Height Range: 1.25 - 3.75 inches (6 positions)
• Deck Material: Steel
• Drive: Rear-wheel
• Wheels: 8-inch rear, 7-inch front
• Grass Bag Capacity: 2.1 bushels
• Weight: Approx. 65 lbs
• Fuel Tank Capacity: 1 quart
• Oil Capacity: 20 oz. (SAE 30)

Controls and Operation

Familiarize yourself with controls before starting.

Handle Controls: Drive control lever (engages rear-wheel drive), Height adjustment lever, Engine stop lever (must be held to run).

Starting Procedure:

1. Check oil and fuel levels.
2. Move height adjustment lever to desired position.
3. Push primer bulb 3 times (cold engine).
4. Set throttle control to FAST position.
5. Hold engine stop lever against handle.
6. Pull recoil starter cord briskly.

Stopping: Release engine stop lever; engine will stop. For emergency stop, release lever immediately.

Cutting Height Adjustment

Adjust cutting height to match grass conditions.

1. Stop engine and wait for blade to stop completely.
2. Locate single-lever adjustment near each wheel.
3. Move lever to desired position (1-6, with 1 being lowest).
4. Ensure all four levers are set to same position for even cut.

Tip: For first mow of season or very tall grass, set to highest position, then gradually lower.

Maintenance Schedule

Regular maintenance ensures optimal performance and extends mower life.

Engine Care

Proper engine maintenance is critical for reliable operation.

1. Oil Change: Run engine briefly to warm oil. Drain via dipstick tube or drain plug into container. Refill with SAE 30 detergent oil (20 oz.).
2. Air Filter: Remove cover, clean foam pre-cleaner in soapy water, dry, and re-oil lightly. Replace paper filter if dirty.
3. Spark Plug: Disconnect wire, clean area, remove plug. Check gap (0.030 inches), replace if electrodes are worn.
4. Fuel System: Use fresh gasoline. For storage over 30 days, add fuel stabilizer or drain tank and carburetor.

WARNING! Always disconnect spark plug wire before performing any engine maintenance.

Storage Guidelines

Proper storage prevents damage and extends mower life.

1. Clean mower thoroughly, especially underside of deck.
2. Drain or stabilize fuel: Run engine dry or add fuel stabilizer and run for 5 minutes.
3. Change oil if due.
4. Remove spark plug, add 1 teaspoon of oil into cylinder, pull starter cord slowly to distribute, reinstall plug.
5. Store in clean, dry place, protected from weather.
6. Fold handle for compact storage if desired.

CAUTION! Never store mower with fuel in tank indoors or near open flame. Gasoline vapors are explosive.

Warranty Information

Murray 309008x92B Lawn Mower is covered by a limited warranty. For residential use, the engine is warranted by Briggs & Stratton (2 years), and the mower deck/hardware by Murray (2 years). Commercial use may have different terms. Proof of purchase required. Warranty does not cover normal wear, misuse, neglect, or improper maintenance. For warranty service, contact an authorized Murray service center. Keep this manual and receipt for reference.

Troubleshooting

For Service: Contact authorized Murray service center or call 1-800-269-6215. Visit www.murray.com for additional support.