Husqvarna HU625AWD Parts Manual

The Husqvarna HU625AWD is a powerful gas-powered walk-behind lawn mower featuring All-Wheel Drive (AWD) for superior traction, a Honda GCV160 engine, 21-inch steel deck, 3-in-1 cutting system (mulch, bag, side discharge), Smart Start® technology, and adjustable cutting height. This manual provides detailed parts lists, diagrams, 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. Deck Assembly & Cutting System 4. Drive System & Transmission 5. Controls, Handles & Cables 6. Wheels, Axles & Hardware 7. Safety Features & Labels 8. Maintenance Parts & Kits 9. Exploded Diagrams Reference 10. Parts Ordering Information 11. Troubleshooting Parts Issues

Model Identification & Specifications

Locate the model and serial number plate on the mower deck or rear frame. Key identifiers: HU625AWD, Serial Number, Manufacturing Date.

Specification	Description
Model	HU625AWD
Engine	Honda GCV160, 160cc, OHC
Cutting Width	21 inches
Deck Material	Steel, 3-in-1 capability
Drive System	All-Wheel Drive (AWD)
Starting System	Smart Start® recoil
Cutting Height Adjustment	Single lever, 6 positions (1.5-4 inches)
Fuel Tank Capacity	0.95 quarts (0.9 liters)
Oil Capacity	0.61 quarts (0.58 liters)
Weight (Approx.)	85 lbs (38.6 kg)

Engine Assembly & Components

Parts for the Honda GCV160 engine. Always use genuine Husqvarna or Honda parts.

Cylinder & Piston Group: Cylinder, piston, rings, wrist pin, circlips.
Crankshaft & Camshaft: Crankshaft assembly, camshaft, bearings.
Valve Train: Valves (intake/exhaust), springs, retainers, pushrods, rocker arms.
Ignition System: Spark plug (NGK BPR6ES), ignition coil, flywheel, stop switch.
Fuel System: Carburetor, air filter, fuel tank, fuel line, primer bulb.
Lubrication System: Oil drain plug, dipstick, filler neck.
Recoil Starter: Starter assembly, rope, pulley, spring.
Engine Covers & Shrouds: Blower housing, heat shield, muffler guard.

WARNING! Disconnect spark plug before servicing engine. Use proper torque specifications.

Deck Assembly & Cutting System

21-inch steel deck parts for mulching, bagging, and side discharge.

Deck Shell: Main deck housing, reinforcement brackets.
Blade & Spindle: High-lift mulching blade (P/N 532404204), spindle assembly, bearings, seal.
Blade Adapter & Bolt: Adapter, arbor bolt (5/8-18), washer, lock nut.
Discharge Chute: Side discharge chute, deflector, mounting hardware.
Mulching Plug: Mulch cover insert for 3-in-1 system.
Bagging System: Rear grass bag, bag adapter frame, support brackets.
Height Adjustment: Height adjustment lever, linkage rods, pivot brackets, adjustment quadrant.
Deck Wheels: Front anti-scalp wheels, axles, bushings.

CAUTION! Ensure blade is balanced and securely tightened. Replace damaged blades immediately.

Drive System & Transmission

All-Wheel Drive System: Front and rear wheel engagement for traction.
Drive Belts: Main drive belt (P/N 532404205), AWD engagement belt.
Transmission: Gear case assembly, input/output shafts, gears, seals.
Drive Control: Drive control lever, cable, linkage, return spring.
Wheel Hubs: Drive hubs for rear wheels, splined axles.
Idler Pulleys: Belt guide pulleys, tensioner arm, springs.
Bearings & Bushings: Wheel bearings, pivot bushings for drive system.

Controls, Handles & Cables

Operator control parts for safe and easy operation.

Handle Assembly: Upper and lower handle bars, knobs, bolts. Control Levers: Drive speed control lever, blade engagement (Bail) lever. Cables: Throttle cable, drive control cable, blade engagement cable. Safety Features: Operator presence control (OPC) system, brake/clutch mechanism, interlock switches. Comfort: Handle grips, vibration dampeners.

Wheels, Axles & Hardware

Rear wheels are driven; front wheels steer. Use correct parts for replacement.

Rear Wheels: 10-inch diameter, driven wheels with tread pattern.
Front Wheels: 8-inch diameter, anti-scalp caster wheels.
Axles: Rear drive axles (splined), front wheel axles (smooth).
Hardware Kit: Common bolts, nuts, washers, locknuts, pins, clips.

Tip: Lubricate axle points periodically. Ensure wheel nuts are tight.

Safety Features & Labels

Critical safety parts and decals. Replace damaged labels immediately.

Blade Engagement System: Bail lever, cable, return spring, interlock switch.
Operator Presence Control: OPC module, wiring, handle sensors.
Safety Labels: Warning decals (operation, blade, fuel), model/serial plate.
Engine Stop Switch: Stop lever, cable, ignition grounding wire.
Deflector & Chute: Discharge deflector, chute, warning label.

WARNING! Never operate mower with missing or illegible safety labels or a defective safety system.

Maintenance Parts & Kits

Common wear items and service kits for routine maintenance.

Part Description	Part Number (Example)	Application
Air Filter	532404206	Engine intake
Spark Plug	NGK BPR6ES	Ignition
Oil Filter	Not applicable (no filter)	Engine oil
Blade Set (Mulching)	532404204	Cutting system
Drive Belt Kit	532404205	Transmission
Wheel Bearing Kit	532404207	Front/Rear wheels
Carburetor Repair Kit	532404208	Fuel system
Hardware Kit	532404209	General fasteners

Exploded Diagrams Reference

Refer to official Husqvarna parts diagrams for visual part location and assembly order. Diagrams are organized by assembly group (e.g., Deck Group, Engine Group, Handle Group). Each numbered item corresponds to a part in the list.

CAUTION! Use diagrams as a guide only. Follow official service manual procedures for disassembly/assembly.

Parts Ordering Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. Copyright © 2025 Husqvarna; trademarks of Husqvarna AB. For genuine Husqvarna parts, always use the model (HU625AWD) and serial number. Contact an authorized Husqvarna dealer or visit www.husqvarna.com/us/parts. For support, contact Husqvarna Customer Service at 1-800-487-5962.

Troubleshooting Parts Issues

Symptom	Possible Part Failure	Corrective Action
Loss of drive power	Worn drive belt, damaged transmission	Inspect and replace drive belt (P/N 532404205). Check transmission for damage.
Uneven cutting	Bent blade, worn spindle bearings	Replace blade (P/N 532404204). Inspect and replace spindle assembly if needed.
Engine won't start	Faulty spark plug, clogged air filter	Replace spark plug and air filter (P/N 532404206).
Excessive vibration	Unbalanced blade, loose hardware	Balance or replace blade. Tighten all deck and engine mounting bolts.
Grass not discharging	Clogged deck, worn blade	Clean deck underside. Replace blade if dull or damaged.

Note: Always disconnect spark plug wire before performing any maintenance or parts replacement.

Service & Parts: 1-800-487-5962; www.husqvarna.com/us/parts