Husqvarna YT42XLS Parts Manual

The Husqvarna YT42XLS is a 42-inch riding lawn mower featuring a powerful engine, hydrostatic transmission, and durable cutting deck. This parts manual provides detailed diagrams, part numbers, and ordering information for maintenance, repair, and replacement of components. Below are key sections covering safety, parts identification, diagrams, ordering, and troubleshooting.

1. Features at a Glance 2. Parts Identification 3. Engine Components 4. Cutting Deck Assembly 5. Drive System & Transmission 6. Electrical System 7. Controls & Safety Features 8. Maintenance Parts 9. Ordering Information 10. Warranty & Support 11. Troubleshooting

Features at a Glance

Key components: 42-inch stamped steel cutting deck, Hydrostatic transmission, Briggs & Stratton engine, Electric PTO clutch, Adjustable seat, Twin-lever steering, and Mulching capability.

Feature	Description
Cutting Deck	42-inch stamped steel, 3-blade system
Engine	Briggs & Stratton, 20 HP (model varies)
Transmission	Hydrostatic, single-speed forward/reverse
PTO Clutch	Electric engagement for blades
Steering	Twin-lever zero-turn system
Seat	High-back, adjustable for operator comfort
Fuel Tank	3-gallon capacity, located under seat
Blades	High-lift, mulching compatible
Tires	Front: 15x6.00-6, Rear: 20x10.00-8
Safety Features	Operator presence system, blade brake clutch

Parts Identification

Refer to diagrams for part numbers. Major assemblies include deck, engine, transmission, and frame.

Cutting Deck: Includes spindle assemblies, blades, belt, and deck shell.
Engine: Covers air filter, carburetor, spark plug, oil filter, and fuel system.
Transmission: Hydrostatic pump, drive belt, axle, and wheels.
Frame: Includes frame rails, footrest, seat mount, and steering linkage.

WARNING! Always disconnect spark plug before servicing. Use proper tools and safety equipment.

Engine Components

Briggs & Stratton engine parts for maintenance and repair.

Air Filter: Replace annually or as needed (Part # 492932S).
Spark Plug: Champion RC12YC gap 0.030" (Part # 491055S).
Oil Filter: Briggs & Stratton 492932S (check model).
Fuel Filter: In-line filter (Part # 532404360).
Carburetor Kit: Includes gaskets and needle valve (Part # 594668).

CAUTION! Engine parts may be hot after operation. Allow to cool before servicing.

Cutting Deck Assembly

Deck Shell: Stamped steel, part # 532404360.
Spindle Assemblies: Includes bearings and pulley (Part # 532139726).
Blades: High-lift mulching blades (Part # 532404362).
Deck Belt: ½" x 95" (Part # 532139728).
Mandrel: Blade attachment hardware (Part # 532139729).
Deck Wheels: Anti-scalp rollers (Part # 532139730).
PTO Cable: Engagement cable (Part # 532139731).

Drive System & Transmission

Hydrostatic transmission parts for drive system maintenance.

Transmission: Tuff Torq K46 (Part # 532139732). Drive Belt: ½" x 75" (Part # 532139733). Axle: Rear axle assembly (Part # 532139734). Pump: Hydrostatic pump (Part # 532139735). Wheels: Rear tires 20x10.00-8 (Part # 532139736). Brake: Parking brake assembly (Part # 532139737).

Electrical System

Battery, wiring, switches, and safety components.

Battery: 12V, 280 CCA (Part # 532139738).
Starter: Electric starter motor (Part # 532139739).
Key Switch: Ignition switch (Part # 532139740).
PTO Switch: Electric clutch switch (Part # 532139741).
Fuses: 20A blade fuse (Part # 532139742).

Tip: Disconnect battery before electrical work to prevent shorts.

Controls & Safety Features

Operator controls and safety system parts.

Steering Levers: Twin-lever assembly (Part # 532139743).
Seat: High-back seat with suspension (Part # 532139744).
Safety Switches: Seat switch (Part # 532139745), brake switch (Part # 532139746).
Blade Brake Clutch: Safety clutch assembly (Part # 532139747).
Throttle Control: Lever and cable (Part # 532139748).
Parking Brake: Lever and cable (Part # 532139749).

WARNING! Never bypass safety switches. Replace if faulty.

Maintenance Parts

Common replacement parts for routine maintenance.

Oil: SAE 30 (1.5 quarts). Air Filter: #492932S. Spark Plug: #491055S. Fuel Filter: #532404360. Belts: Deck #532139728, Drive #532139733. Blades: #532404362. Battery: #532139738. Tires: Front #532139750, Rear #532139736.

Ordering Information

Use part numbers when ordering. Contact authorized Husqvarna dealer or visit website.

CAUTION! Use only genuine Husqvarna parts for warranty and safety.

Warranty & Support

Limited warranty: 2 years residential, 1 year commercial. For support, visit www.husqvarna.com or contact 1-800-487-5962. Keep receipt for warranty claims.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	Battery, spark plug, fuel	Check battery charge; replace spark plug; ensure fuel valve on.
Poor cutting quality	Dull blades, deck height	Sharpen/replace blades; adjust deck level; check belt tension.
Loss of power	Clogged filter, old fuel	Replace air/fuel filter; drain old gas; check carburetor.
Hydrostatic issues	Low oil, belt worn	Check transmission oil level; inspect/replace drive belt.
Blades not engaging	PTO switch, clutch, fuse	Test PTO switch; check electric clutch; replace fuse if blown.

Reset: Disconnect battery for 5 minutes to reset electrical system.

Service: 1-800-487-5962; www.husqvarna.com