Murray M2255 Lawn Mower Manual

The Murray M2255 is a 22-inch push lawn mower featuring a 5.5 HP Briggs & Stratton engine, 3-in-1 mulching/bagging/side-discharge capability, single-lever height adjustment (6 positions: 1.25"-3.75"), durable steel deck, easy-start system, washout port for cleaning, and large 2.1 bushel rear bag. Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.

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

Features at a Glance

Key components: 5.5 HP Briggs & Stratton engine, 22-inch steel cutting deck, rear grass catcher, single-lever height adjuster, washout port, fold-down handle.

Feature	Description
Engine	5.5 HP Briggs & Stratton, 4-cycle, overhead valve
Cutting Width	22 inches
Cutting Height	6 positions (1.25" to 3.75")
Deck Material	Durable powder-coated steel
Grass Management	3-in-1: Mulch, Bag, Side Discharge
Starter System	Recoil pull-start with primer bulb
Bag Capacity	2.1 bushel rear bag
Handle	Fold-down for compact storage
Washout Port	For easy deck cleaning
Wheels	8-inch front, 10-inch rear

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 upper handle: Connect to lower handle, tighten knobs.
Attach grass bag: Hook bag frame onto rear deck brackets.
Install side discharge chute (if not mulching): Snap into place on right side.
Add engine oil: Use SAE 30 (approx. 20 oz) – check dipstick.
Add gasoline: Use fresh unleaded (87 octane minimum).

WARNING! Do not add gasoline during assembly. Keep away from sparks or flames.

Safety Guidelines

Read all instructions before operation. Wear appropriate safety gear.

Clear mowing area of stones, toys, and debris.
Never mow wet grass – risk of slipping and clogging.
Keep hands and feet away from moving parts.
Stop engine before unclogging deck or adjusting height.
Do not allow children to operate mower.
Use hearing and eye protection.

DANGER! Gasoline is flammable. Refuel outdoors, engine off and cool.

Specifications

Model: Murray M2255
Engine: 5.5 HP Briggs & Stratton 4-cycle
Cutting Width: 22 inches
Cutting Height Range: 1.25" – 3.75" (6 positions)
Deck: 22-inch steel, powder-coated
Grass Bag Capacity: 2.1 bushels
Wheels: 8" front, 10" rear
Weight: Approx. 65 lbs
Fuel Tank Capacity: 1 quart
Oil Capacity: 20 oz (SAE 30)

Controls and Operation

Handle Controls: Throttle lever, drive control bar, height adjust lever.

Starting Procedure:

Check oil and fuel levels.
Prime engine: Press primer bulb 3 times (cold engine).
Set throttle to FAST position.
Pull recoil starter firmly.

Stopping: Release drive control bar, move throttle to STOP, wait for blade to stop.

Driving: Squeeze drive control bar against handle to engage self-propel (if equipped). Release to stop movement.

Cutting Height Adjustment

Single-lever adjustment for all four wheels.

Stop engine and wait for blade to stop.
Pull height adjust lever outward.
Move lever to desired position (1-6).
Release lever to lock in place.

Height Settings: 1 (1.25"), 2 (1.75"), 3 (2.25"), 4 (2.75"), 5 (3.25"), 6 (3.75").

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

Mulching & Bagging Setup

Mulching: Install mulch plug (included). Grass is cut finely and returned to lawn as fertilizer.

Bagging: Attach rear bag. Ensure chute deflector is raised.

Side Discharge: Remove mulch plug and bag; install side discharge chute.

WARNING! Always stop engine before changing grass management mode.

Maintenance Schedule

Interval	Task
Before each use	Check oil level, inspect blade, clear debris
Every 25 hours	Change engine oil (or seasonally)
Every season	Replace air filter, spark plug
As needed	Sharpen or replace blade
After each use	Clean underside of deck

Blade Sharpening: Remove blade (use block to prevent rotation), file at original angle.

Storage & Winterization

End-of-season preparation:

Drain or add fuel stabilizer to gasoline tank.
Change engine oil.
Remove spark plug, add 1 tsp oil, pull starter slowly to coat cylinder.
Clean deck thoroughly using washout port.
Store in dry place, cover mower.

CAUTION! Never store with gasoline in tank untreated – can damage carburetor.

Warranty Information

Murray M2255 includes a 2-year limited warranty for residential use. Proof of purchase required. Warranty covers defects in materials/workmanship; does not cover normal wear, misuse, or lack of maintenance. For warranty service, contact Murray customer service at 1-800-XXX-XXXX or visit www.murray.com. Keep this manual for reference.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	No fuel, stale gas, clogged air filter	Add fresh gas, prime, clean/replace air filter.
Engine runs poorly	Dirty spark plug, old gasoline	Replace spark plug, drain and refill with fresh gas.
Uneven cutting	Dull blade, uneven tire pressure	Sharpen or balance blade, check tire pressure.
Mower vibrates excessively	Bent or unbalanced blade	Replace blade; ensure tight mounting bolt.
Grass not discharging	Wet grass, clogged deck	Mow when dry; stop engine and clear debris.
Self-propel not working	Drive cable loose or broken	Adjust or replace drive cable.

Service: For repairs, use authorized service centers. Always disconnect spark plug wire before servicing.