Husqvarna Lawn Mower Parts Manual HU 725 AWD

The Husqvarna HU 725 AWD is a self-propelled, all-wheel-drive walk-behind lawn mower featuring a powerful Briggs & Stratton engine, 21-inch cutting deck, 7-speed transmission, AWD traction system, Smart Start technology, air induction system for superior mulching, and ergonomic controls. This parts manual provides detailed diagrams, part numbers, and ordering information for maintenance and repair. Below are key sections for identification, engine parts, deck assembly, drive system, controls, and ordering.

1. Model Identification & Specifications 2. Engine Assembly & Components 3. Cutting Deck & Blade System 4. All-Wheel Drive (AWD) System 5. Controls & Handle Assembly 6. Safety Features & Labels 7. Maintenance Schedule 8. Troubleshooting Parts Reference 9. Parts Ordering & Warranty 10. Exploded Diagrams Index

Model Identification & Specifications

Locate model and serial number on decal near rear discharge chute or engine housing.

Specification	Description
Model	HU 725 AWD
Engine	Briggs & Stratton 725EX Series, 163cc
Cutting Width	21 inches (53 cm)
Drive System	All-Wheel Drive (AWD), 7-speed
Cutting Height	1-1/4 to 3-3/4 inches (6 positions)
Deck Material	Steel, reinforced
Start System	Smart Start, recoil backup
Mulching	Air Induction Mulching System
Fuel Tank	0.95 gallons (3.6 liters)
Weight	Approx. 85 lbs (38.6 kg)

Engine Assembly & Components

Briggs & Stratton 725EX engine parts list and diagram references.

Cylinder & Piston: Part # 694356 - Includes piston rings, connecting rod.
Carburetor Assembly: Part # 792227 - With fuel line and filter.
Air Filter: Part # 498270 - Dual-element foam and paper.
Spark Plug: Part # 492932S - Champion RC12YC gap .030".
Starter Assembly: Part # 694123 - Recoil starter with rope.
Oil Drain Plug: Part # 691068 - Located at base of engine.

WARNING! Disconnect spark plug wire before servicing engine. Use genuine Husqvarna parts.

Cutting Deck & Blade System

21-inch steel deck with mulching plug and blade brake clutch system.

Deck Shell: Part # 532404572 - Reinformed steel, corrosion-treated.
Blade: Part # 532404573 - Mulching blade, 21-inch length.
Blade Adapter: Part # 532197134 - Secures blade to spindle.
Spindle Assembly: Part # 532404574 - Includes bearings and housing.
Discharge Chute: Part # 532404575 - Rear discharge, safety compliant.
Height Adjustment Lever: Part # 532404576 - Single-point adjustment.

CAUTION! Always balance blade after sharpening. Replace damaged blades immediately.

All-Wheel Drive (AWD) System

Drive Belt: Part # 532404577 - AWD specific, linked to transmission.
Front Axle Assembly: Part # 532404578 - Includes differential gears.
Rear Axle Assembly: Part # 532404579 - With traction control linkage.
Transmission: Part # 532404580 - 7-speed gearbox, sealed unit.
Drive Control Cable: Part # 532404581 - Connects handle to transmission.
Tires: Part # 532404582 - 8-inch rear, 7-inch front, pneumatic.

Controls & Handle Assembly

Ergonomic handle with controls for drive, blade engagement, and speed.

Handle: Part # 532404583 - Foldable, height-adjustable. Drive Control Lever: Part # 532404584 - Engages AWD system. Blade Engage Lever: Part # 532404585 - With safety interlock. Speed Selector: Part # 532404586 - 7-position dial. Wheels: Part # 532404587 - Front swivel, rear drive.

Safety Features & Labels

Safety decals and parts for compliance.

Blade Warning Decal: Part # 532404588 - Located on deck.
Operation Manual Decal: Part # 532404589 - On handle.
Engine Hot Warning: Part # 532404590 - Near muffler.
Safety Interlock Switch: Part # 532404591 - Prevents blade engagement without operator.

Tip: Replace faded or damaged safety labels immediately.

Maintenance Schedule

Recommended parts replacement intervals.

Every 25 hours: Air filter (Part # 498270), spark plug (Part # 492932S).
Every 50 hours: Blade sharpening/replacement (Part # 532404573).
Every 100 hours: Drive belt inspection (Part # 532404577).
Seasonal: Change engine oil, lubricate cables and height adjuster.
Storage: Fuel stabilizer, clean deck underside.

WARNING! Use only SAE 30 detergent oil for engine. Do not over-tighten belts.

Troubleshooting Parts Reference

Symptom	Possible Part Needed	Part Number
Engine won't start	Spark plug, Air filter, Fuel filter	492932S, 498270, 792227 (included)
Poor cutting performance	Blade, Spindle assembly	532404573, 532404574
AWD not engaging	Drive belt, Control cable	532404577, 532404581
Vibration	Blade adapter, Deck mounting bolts	532197134, 532404592 (bolt kit)
Handle loose	Handle pivot bolts, Adjustment knobs	532404593, 532404594

Parts Ordering & Warranty

Genuine Husqvarna parts ensure optimal performance and safety.

Ordering: Use part numbers in this manual. Contact authorized dealer or visit www.husqvarna.com/us/parts. Warranty: Limited warranty covers defects in materials/workmanship. Engine warranty provided by Briggs & Stratton. Keep proof of purchase. Support: 1-800-487-5962; www.husqvarna.com.

Exploded Diagrams Index

Refer to following diagram pages for visual part location:

Diagram A-1: Engine Assembly (Page 12)
Diagram B-1: Cutting Deck & Blades (Page 14)
Diagram C-1: AWD Drive System (Page 16)
Diagram D-1: Controls & Handle (Page 18)
Diagram E-1: Safety Decals & Locations (Page 20)

Note: Diagrams are included in full PDF manual. Use with part numbers for accurate identification.