Murray NMP22675HW Lawn Mower Manual

The Murray NMP22675HW is a 22-inch, 190cc gas-powered walk-behind lawn mower featuring a Briggs & Stratton engine, 3-in-1 discharge system (mulch, bag, side discharge), 6-position single-lever height adjustment, push-button start, and durable steel deck. This manual covers safety instructions, assembly, operation, maintenance, troubleshooting, and specifications to ensure safe and efficient use.

1. Features at a Glance 2. Assembly Instructions 3. Safety Instructions 4. Specifications 5. Controls and Operation 6. Starting & Stopping Procedure 7. Cutting Height Adjustment 8. Maintenance Schedule 9. Storage Instructions 10. Warranty Information 11. Troubleshooting

Features at a Glance

Key components: 190cc Briggs & Stratton engine, 22-inch steel cutting deck, rear grass bag, mulch plug, side discharge chute, single-lever height adjustment, and push-button primer.

Feature	Description
Engine	190cc Briggs & Stratton 4-cycle gasoline engine
Cutting Width	22 inches
Cutting Deck	Durable steel construction
Discharge Options	3-in-1: Mulch, Bag, Side Discharge
Height Adjustment	Single-lever, 6 positions (1.25" - 3.75")
Start Type	Recoil start with primer button
Wheels	8-inch rear, 7-inch front
Fuel Tank Capacity	0.95 quarts (0.9 liters)
Oil Capacity	20 oz (0.6 liters)
Weight	Approximately 65 lbs (29.5 kg)

Assembly Instructions

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

Attach handle: Align lower handle with deck brackets, secure with provided bolts and washers.
Install wheels: Slide wheels onto axles, secure with retainer clips or nuts.
Attach grass bag: Hook bag onto rear deck brackets and secure straps.
Install side discharge chute: Attach to discharge opening on right side of deck.
Add mulch plug (if mulching): Insert plug into rear discharge opening.
Add oil and gasoline: Fill engine with SAE 30 oil (check dipstick). Add fresh unleaded gasoline (87 octane minimum).

WARNING! Do not add gasoline during assembly or near open flames. Ensure all fasteners are tight before operation.

Safety Instructions

Read all instructions before operating. Failure to follow may result in serious injury.

Clear mowing area of stones, toys, and debris that could be thrown by blade.
Always wear sturdy footwear and eye protection.
Do not mow wet grass or in the rain.
Never allow children or pets in area during operation.
Disconnect spark plug wire before performing any maintenance or clearing blockages.
Use extreme caution when mowing on slopes; mow across slopes, not up and down.
Never leave mower unattended with engine running.
Stop engine and wait for blade to stop completely before crossing gravel drives or roads.

DANGER! Rotating blade can cause severe injury. Keep hands and feet away from cutting deck at all times.

Specifications

Model: NMP22675HW
Engine: Briggs & Stratton 190cc, 4-cycle
Cutting Width: 22 inches
Cutting Heights: 6 positions: 1.25", 1.75", 2.25", 2.75", 3.25", 3.75"
Deck Material: Steel
Discharge System: 3-in-1 (Mulch, Bag, Side Discharge)
Wheels: Front: 7", Rear: 8"
Fuel Type: Unleaded gasoline (87 octane or higher)
Oil Type: SAE 30 detergent oil (above 40°F / 4°C)
Starting System: Recoil with primer

Controls and Operation

Handle Controls: Engine control lever (must be held to run), height adjustment lever, primer button.

Operation Steps:

Check oil and fuel levels.
Select discharge option (bag, mulch, or side discharge).
Adjust cutting height lever to desired position.
Prime engine by pressing primer button 3 times (cold start).
Hold engine control lever against handle.
Pull recoil starter cord firmly.

To stop engine, release engine control lever. For emergency stop, release lever immediately.

Starting & Stopping Procedure

Starting Engine (Cold):

Move mower to clear, level area.
Set cutting height to highest position.
Press primer bulb 3 times.
Hold engine control lever against handle.
Pull starter cord briskly until engine starts.

Starting Engine (Warm): Priming not usually needed. Follow steps 4-5.

Stopping Engine: Release engine control lever. Engine and blade will stop within a few seconds.

Tip: If engine does not start after 3 pulls, wait 2 minutes and repeat. Do not flood engine with excessive priming.

Cutting Height Adjustment

Single-lever adjustment changes height for all four wheels simultaneously.

Stop engine and wait for blade to stop.
Pull height adjustment lever toward wheel.
Move lever to desired position (1-6, with 1 being lowest cut).
Release lever to lock into place.

For best results, do not cut more than 1/3 of grass blade length at one time. Adjust height seasonally: higher in summer heat, lower in spring/fall.

Maintenance Schedule

Maintenance Task	Frequency
Check engine oil level	Before each use
Check for loose fasteners	Before each use
Clean underside of deck	After each use (when cool)
Sharpen or replace blade	Every 25 hours or when dull
Change engine oil	First 5 hours, then every 50 hours
Replace air filter	Every 25 hours or as needed
Replace spark plug	Every 100 hours
Lubricate wheel bearings	Every season

CAUTION! Always disconnect spark plug wire before performing any maintenance.

Storage Instructions

Proper storage extends mower life and ensures easy starting next season.

Run engine to use up remaining fuel, or add fuel stabilizer to full tank and run for 5 minutes.
Change oil and replace air filter if due.
Remove spark plug, add 1 tablespoon of oil into cylinder, pull starter cord slowly to distribute, reinstall plug.
Clean entire mower, especially underside of deck.
Sharpen blade or replace if needed.
Store in clean, dry place, preferably covered.

WARNING! Gasoline is flammable. Store mower away from heat sources, open flames, or pilot lights.

Warranty Information

Murray NMP22675HW comes with a limited warranty covering defects in materials and workmanship. Engine is covered by Briggs & Stratton warranty terms.

Residential Use: 2-year limited warranty on mower.
Commercial Use: 90-day limited warranty.
Engine Warranty: Refer to Briggs & Stratton documentation included with engine.

Warranty does not cover normal wear, misuse, improper maintenance, or commercial use if purchased for residential. For warranty service, contact Murray customer service at 1-800-XXX-XXXX or visit www.murray.com. Keep original receipt as proof of purchase.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine will not start	Empty fuel tank, old gasoline, clogged air filter, spark plug wire disconnected	Add fresh fuel, replace air filter, check spark plug connection, prime properly.
Engine runs poorly or stalls	Dirty air filter, old fuel, clogged fuel line, water in fuel	Clean/replace air filter, drain and replace fuel, check fuel line.
Uneven cutting	Dull blade, uneven tire pressure, deck clogged	Sharpen or balance blade, check tire pressure, clean deck.
Excessive vibration	Loose blade, bent blade, debris stuck in blade	Stop engine, disconnect spark plug, tighten or replace blade, remove debris.
Mower leaves uncut strips	Deck clogged, cutting too low, walking too fast	Clean deck, raise cutting height, slow walking pace.
Grass not discharging properly	Wet grass, deck clogged, engine speed too low	Mow when grass is dry, clean deck, check throttle setting.

For Service: 1-800-XXX-XXXX; www.murray.com