Murray MXH675 Lawn Mower Manual

The Murray MXH675 is a 6.75 horsepower, 21-inch push lawn mower featuring a Briggs & Stratton engine, 3-in-1 mulching/bagging/side-discharge capability, single-lever height adjustment, durable steel deck, and easy-start system. This manual covers safety instructions, assembly, operation, maintenance, troubleshooting, and specifications to ensure proper and safe use of your mower.

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

Features at a Glance

Key components: 6.75 HP Briggs & Stratton engine, 21-inch steel cutting deck, rear grass bag, mulch plug, side discharge chute, single-lever height adjuster, and recoil starter.

Feature	Description
Engine	6.75 HP Briggs & Stratton, 4-cycle, overhead valve
Cutting Width	21 inches
Cutting Deck	Durable steel construction
Cutting Options	Mulch, Bag, Side Discharge (3-in-1)
Height Adjustment	Single lever, 6 positions (1.5-3.75 inches)
Starter	Recoil (pull-start) system
Fuel Tank	1.0 quart capacity
Wheels	8-inch rear, 7-inch front
Bag Capacity	2.0 bushels
Weight	Approximately 65 lbs

Assembly Instructions

Unpack all parts from the box. Assembly requires basic tools (included: wrench).

Attach the handle: Align lower handle with deck brackets, secure with bolts and wing nuts.
Install the upper handle: Connect to lower handle, secure with provided hardware.
Attach the grass bag: Hook bag frame onto rear deck brackets; ensure it clicks into place.
Install the mulch plug (if mulching): Insert into rear discharge opening.
Check wheel installation: Ensure all wheels are securely fastened and rotate freely.
Add oil and fuel: Use SAE 30 motor oil (approx. 20 oz) and unleaded gasoline (87 octane minimum).

WARNING! Do not add fuel indoors or near ignition sources. Assemble on a flat, stable surface.

Safety Information

Read all instructions before operating. Always wear sturdy shoes and eye protection.

Clear mowing area: Remove stones, toys, and other objects that could be thrown.
Check fuel: Fill outdoors, away from sparks or flames. Wipe up spills immediately.
Inspect mower: Ensure blade is sharp and secure, all parts are tight, and no damage exists.
Start safely: Firmly grip handle, set engine control to FAST, pull starter cord smoothly.
Operate carefully: Push mower forward; do not pull backward or mow in reverse.
Stop engine: Release blade control handle to stop blade; turn fuel valve OFF for storage.

DANGER! Keep hands and feet away from rotating blade. Never remove grass bag or unclog chute with engine running.

Specifications

Model: Murray MXH675
Engine: Briggs & Stratton 6.75 HP, 4-cycle, OHV
Cutting Width: 21 inches
Cutting Height: 1.5 to 3.75 inches (6 positions)
Deck Material: Steel
Fuel Type: Unleaded gasoline (87 octane or higher)
Oil Type: SAE 30 (summer), 10W-30 (variable temps)
Starting System: Recoil pull-start
Bag Capacity: 2.0 bushels
Warranty: 2-year limited

Controls and Operation

Main controls: Blade control handle (deadman switch), throttle control, primer bulb, recoil starter grip.

Starting Procedure:

Check oil and fuel levels.
Press primer bulb 3 times (cold engine).
Set throttle control to FAST position.
Hold blade control handle against handlebar.
Pull starter cord briskly until engine starts.

Stopping: Release blade control handle to stop blade. Move throttle to STOP position. Turn fuel valve OFF if storing.

Cutting Height Adjustment

Single lever adjusts all four wheels simultaneously.

Stop engine and wait for blade to stop completely.
Pull height adjustment lever outward.
Move lever to desired position (1=lowest, 6=highest).
Release lever to lock into place.
Check that all wheels are at same height.

Tip: For first mow of season or very tall grass, use highest setting, then lower for second pass.

3-in-1 Function Setup

Configure for mulching, bagging, or side discharge.

Mulching: Install mulch plug in rear discharge opening. Remove grass bag and side chute.
Bagging: Remove mulch plug. Attach grass bag to rear brackets. Ensure chute is closed.
Side Discharge: Remove mulch plug and grass bag. Attach side discharge chute to deck opening.

WARNING! Always stop engine before changing cutting functions. Ensure all attachments are securely installed.

Maintenance Schedule

Regular maintenance ensures optimal performance and longevity.

Interval	Task
Before each use	Check oil level, inspect blade for damage, clear deck of debris
Every 25 hours	Change oil (or annually), check air filter, inspect spark plug
Every season	Sharpen or replace blade, clean under deck, check wheel bolts
As needed	Replace air filter, spark plug, fuel filter

CAUTION! Disconnect spark plug wire before performing any maintenance to prevent accidental starting.

Storage Guidelines

Proper storage prevents fuel system issues and corrosion.

Run engine to use up fuel in carburetor, or add fuel stabilizer to tank.
Change oil at end of season if due.
Clean underside of deck thoroughly.
Remove spark plug, add 1 tablespoon of oil to cylinder, pull starter slowly to coat.
Store in clean, dry place, covered to prevent dust accumulation.

CAUTION! Never store mower with fuel in tank indoors or in enclosed spaces due to fire risk.

Warranty Information

Murray MXH675 comes with a 2-year limited warranty covering defects in materials and workmanship under normal residential use. Warranty does not cover damage from misuse, neglect, commercial use, or improper maintenance. To make a warranty claim, contact Murray customer service at 1-800-800-7310 or visit www.murray.com. Keep your dated sales receipt as proof of purchase.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	No fuel, old gas, clogged filter	Add fresh fuel; check fuel valve ON; clean/replace fuel filter.
Engine runs poorly	Dirty air filter, old spark plug	Clean/replace air filter; check/replace spark plug gap (0.030").
Uneven cutting	Dull blade, uneven tire pressure	Sharpen or balance blade; check cutting height adjustment.
Vibration	Loose blade, bent blade	Tighten blade bolt (torque to 40 ft-lbs); replace if bent.
Bag not filling	Wet grass, clogged deck	Mow when grass is dry; stop engine and clear deck clogs.

Service: For repairs, use authorized service centers. Contact 1-800-800-7310 or www.murray.com.