Murray 21P675HW Lawn Mower Manual

The Murray 21P675HW is a 21-inch push lawn mower featuring a 675cc Briggs & Stratton engine, 3-in-1 mulching/bagging/side-discharge capability, single-lever height adjustment (1.5-4 inches), durable steel deck, easy-start system, large rear wheels for maneuverability, and a 2.5-bushel grass bag. 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: 675cc Briggs & Stratton engine, 21-inch steel cutting deck, 3-in-1 function, single-lever height adjustment, rear grass bag, and easy-start system.

Feature	Description
Engine	675cc Briggs & Stratton, 4-cycle, OHV
Cutting Width	21 inches
Cutting Height	1.5 to 4 inches (6 positions)
Deck Material	Durable powder-coated steel
Drive System	Push (manual)
Wheels	Large 8-inch rear, 7-inch front
Grass Bag Capacity	2.5 bushels
3-in-1 Function	Mulch, Bag, Side Discharge
Starting System	Recoil with easy-start technology
Weight	Approximately 65 lbs

Assembly Instructions

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

Attach handle: Align lower handle with deck brackets, secure with bolts and wing nuts.
Install grass bag: Attach bag support frame to rear discharge chute, hang bag on frame.
Attach side discharge chute (if needed): Secure to side port with provided pin.
Install mulching plug (if mulching): Insert into rear discharge opening.
Check wheel installation: Ensure all wheels are securely attached and rotate freely.

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

First-Time Setup

Before first use, complete these steps.

Add engine oil: Use SAE 30 detergent oil (approx. 20 oz). Check dipstick.
Add gasoline: Use fresh unleaded gasoline (87 octane minimum). Do not overfill.
Check tire pressure: Inflate to 15 PSI (if applicable).
Adjust cutting height: Set lever to desired position (recommend 3 inches for first mow).
Test operation: Start engine in open area, engage blade, check for smooth operation.

CAUTION! Never add oil or gasoline near open flames or while engine is hot.

Specifications

Model: Murray 21P675HW
Engine: Briggs & Stratton 675cc, 4-cycle OHV
Cutting Width: 21 inches
Cutting Height Range: 1.5 - 4 inches (6 positions)
Deck: 21-inch steel, powder-coated
Grass Bag Capacity: 2.5 bushels
Wheels: 8-inch rear, 7-inch front
Weight: 65 lbs (approx.)
Fuel Tank Capacity: 1.1 gallons
Oil Capacity: 20 oz (SAE 30)

Controls and Operation

Main controls: Engine control lever (stop/run), recoil starter, blade engagement lever, height adjustment lever.

Starting Procedure:

Move engine control lever to RUN position.
Prime engine (if equipped) by pressing primer bulb 3 times.
Pull recoil starter handle firmly until engine starts.
To engage blade: Pull blade engagement lever toward handle.
To stop: Release blade lever, move engine control to STOP.

Operating Tips: Mow when grass is dry. Overlap passes by 2 inches. Change mowing pattern weekly.

Cutting Height Adjustment

Single-lever adjustment controls all four wheels simultaneously.

Stop engine and wait for blade to stop completely.
Pull height adjustment lever outward and move to desired position (1-6).
Release lever to lock in position.
Recommended heights: 2.5-3 inches for most grasses, 1.5 inches for Bermuda/Zoysia.

Tip: Never adjust height while engine is running or blade is engaged.

Mulching & Bagging

3-in-1 system: Configure for mulching, bagging, or side discharge.

Mulching: Install mulching plug in rear discharge. Cuts clippings finely and returns to lawn.
Bagging: Attach grass bag to rear discharge chute. Collects clippings for disposal.
Side Discharge: Install side discharge chute. Ejects clippings to side (for tall/wet grass).

WARNING! Always stop engine before changing discharge mode. Ensure attachments are secure.

Safety Features

Blade brake system: Stops blade within 3 seconds when engagement lever is released. Safety handle: Must be held to keep engine running. Shielded discharge areas. Warning labels for operation and maintenance.

Maintenance & Storage

Regular maintenance ensures optimal performance and longevity.

After Each Use: Clean underside of deck, check for damage.

Monthly: Check oil level, air filter, blade sharpness.

Seasonal: Change oil, replace spark plug, sharpen/replace blade.

Storage: Drain fuel or add stabilizer, clean thoroughly, store in dry place.

CAUTION! Disconnect spark plug wire before performing any maintenance.

Warranty Information

Murray 21P675HW comes with a 2-year limited warranty covering defects in materials and workmanship. Warranty does not cover normal wear, misuse, or lack of maintenance. For warranty claims, contact Murray customer service at 1-800-269-6215 or visit www.murray.com. Keep original receipt as proof of purchase.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	No fuel, old gas, clogged filter	Add fresh gasoline, check fuel line, clean/replace air filter.
Engine runs poorly	Dirty air filter, old spark plug	Clean air filter, replace spark plug, check oil level.
Uneven cutting	Dull blade, uneven tire pressure	Sharpen/replace blade, check tire pressure, level deck.
Excessive vibration	Loose blade, bent blade	Tighten blade bolt, replace bent blade, check for debris.
Grass not discharging	Wet grass, clogged deck	Mow when dry, clean underside, adjust cutting height.

Service: For technical support, call 1-800-269-6215 or visit www.murray.com