Murray PRO 164891 Lawn Mower Manual

The Murray PRO 164891 is a 21-inch, 3-in-1 push lawn mower featuring a 190cc Briggs & Stratton engine, rear bagging, side discharge, and mulching capabilities. It includes a single-lever height adjustment system (1.5-4 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.

Features at a Glance

Key components: 190cc Briggs & Stratton engine, 21-inch steel cutting deck, single-lever height adjustment, 3-in-1 functionality (bag/mulch/side discharge), large 8-inch rear wheels, fold-down handle, and easy-start system.

Assembly Instructions

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

1. Attach the handle: Align lower handle sections with deck brackets, secure with provided bolts and wing nuts.
2. Install the upper handle: Connect to lower handle using bolts; adjust to desired height.
3. Attach the grass bag: Hook bag frame onto rear deck hooks; ensure secure attachment.
4. Install side discharge chute (if needed): Attach to opening on right side of deck.
5. Add engine oil: Fill with SAE 30 detergent oil (approx. 20 oz) to full mark on dipstick.
6. Add fuel: Use fresh unleaded gasoline (87 octane minimum). Do not overfill.

WARNING! Always wear gloves during assembly. Ensure all fasteners are tight before operation.

Safety Information

Read all instructions before operating. Keep bystanders and pets away.

1. Clear mowing area of stones, toys, and other objects that could be thrown.
2. Always wear sturdy footwear and eye protection.
3. Do not mow wet grass or in the rain.
4. Never leave mower unattended with engine running.
5. Disconnect spark plug wire before performing any maintenance.
6. Use extreme caution when mowing on slopes; mow across slopes, not up and down.

DANGER! Keep hands and feet away from rotating blades. Never attempt to unclog or adjust deck while engine is running.

Specifications

• Model: Murray PRO 164891
• Engine: Briggs & Stratton 190cc, 4-cycle
• Cutting Width: 21 inches
• Cutting Height Range: 1.5 - 4 inches (6 positions)
• Deck Construction: 20-gauge steel
• Wheel Size: 8-inch rear, 7-inch front
• Starting System: Recoil with primer
• Fuel Type: Unleaded gasoline (87 octane or higher)
• Oil Type: SAE 30 detergent (API service class SJ or higher)
• Dimensions (LxWxH): 54 x 22 x 42 inches (assembled)

Controls and Operation

Key controls: Engine throttle, recoil starter, primer bulb, blade control bail, height adjustment lever.

Starting Procedure:

1. Check oil and fuel levels.
2. Push primer bulb 3 times (cold engine).
3. Set throttle to FAST position.
4. Pull recoil starter firmly until engine starts.
5. To engage blades: Hold blade control bail against handle.

Stopping: Release blade control bail, move throttle to STOP position.

Cutting Height Adjustment

Single-lever adjustment controls all four wheels simultaneously.

1. Stop engine and wait for blades to stop completely.
2. Pull height adjustment lever outward.
3. Move lever to desired position (1-6, with 1 being lowest).
4. Release lever to lock in position.
5. Test mower movement to ensure all wheels are at same height.

Tip: For first mow of season, set to highest position; gradually lower for subsequent mows.

3-in-1 Function Setup

Configure for bagging, mulching, or side discharge.

1. Bagging: Install grass bag on rear hooks. Ensure mulch plug is removed.
2. Mulching: Install mulch plug in rear discharge opening. Do not attach bag.
3. Side Discharge: Attach side discharge chute. Remove mulch plug and bag.

Note: For optimal mulching, mow when grass is dry and no more than one-third of grass height.

Maintenance Schedule

Blade Sharpening: Disconnect spark plug. Remove blade; maintain original cutting angle. Balance blade before reinstalling.

Storage Guidelines

Proper storage extends mower life.

1. Clean underside of deck thoroughly.
2. Drain fuel tank or add fuel stabilizer.
3. Run engine until it stops to clear carburetor.
4. Change oil if near service interval.
5. Store in dry, covered area away from moisture.
6. Consider removing battery (if electric start model) and storing separately.

CAUTION! Never store mower with fuel in tank in enclosed area due to fire risk.

Warranty Information

Murray PRO 164891 comes with a 2-year limited warranty covering defects in materials and workmanship. Warranty does not cover normal wear, misuse, or lack of maintenance. Proof of purchase required. For warranty service, contact Murray customer service at 1-800-800-7310 or visit www.murray.com.

Troubleshooting

Service: For technical support, call 1-800-800-7310 or visit www.murray.com.