Product Description

The Troy-Bilt Super Bronco 50K FAB XP Riding Lawn Mower combines a large fabricated cutting deck, twin-cylinder KOHLER gasoline engine and hydrostatic transmission in a residential lawn tractor designed for larger maintained properties.

Power is supplied by a 24 HP / 725cc KOHLER twin-cylinder engine. The V-style twin-cylinder configuration is designed to deliver smoother, more balanced operation than a basic single-cylinder lawn-tractor engine while providing the power required for the mower’s 50-inch cutting system.

The mower uses a 50-inch fabricated steel side-discharge deck, giving the tractor a wide cutting path for reducing the number of passes required across larger yards. Troy-Bilt equipped the deck with four anti-scalp wheels plus a nose roller to help the deck follow changes in lawn contour and reduce unwanted turf contact.

A hydrostatic transmission provides continuously variable forward and reverse movement through a foot pedal rather than requiring the operator to manually shift through fixed gears. Troy-Bilt also includes cruise control, allowing a consistent travel speed to be maintained during longer mowing passes.

The cutting blades are activated using an electric PTO, making deck engagement available directly from the operator controls without a mechanical engagement lever.

Troy-Bilt positioned this 50-inch model for mowing larger residential areas of up to approximately 2 acres, although actual mowing suitability depends on terrain, lawn shape, slope, grass condition and obstacles.

A rear attachment point allows compatible tow-behind equipment such as lawn carts, spreaders and aerators to be added when properly matched to the tractor. Compatible attachments are sold separately.

Key Features

• Troy-Bilt Super Bronco 50K FAB XP
• Exact Model 13AQA1BLA66
• 24 HP KOHLER engine
• 725cc displacement
• Twin-cylinder engine configuration
• Electric starting
• Hydrostatic drive
• Foot-pedal transmission control
• K46 transmission platform
• Cruise control
• 50-inch fabricated steel cutting deck
• Side-discharge mowing
• Electric PTO engagement
• Four anti-scalp deck wheels
• Front deck nose roller
• Large residential mowing platform
• Rear attachment compatibility
• Designed for lawns up to approximately 2 acres

Core model specifications are confirmed by Troy-Bilt’s archived official listing.

Technical Specifications

Engine Configuration

24 HP / 725cc KOHLER Twin-Cylinder

The exact XP model uses:

Engine Brand: KOHLER
Output: 24 HP
Displacement: 725cc
Configuration: Twin Cylinder

This is the critical specification distinguishing the prior-year 13AQA1BLA66 XP from the newer 50K FAB.

Hydrostatic Drive Configuration

The Super Bronco 50K FAB XP uses a:

Hydrostatic Transmission

with:

Foot-Pedal Control

and:

Cruise Control.

The archived Troy-Bilt manual descriptor identifies the tractor as:

50SD FAB K46 XP

which confirms its K46-based hydrostatic platform.

Cutting Deck Configuration

50-Inch Fabricated Steel Deck

Cutting Width: 50 in.
Construction: Fabricated Steel
Discharge: Side

The fabricated deck is intended to provide greater structural rigidity than a lighter stamped-deck design. Troy-Bilt specifically describes this as a 50-inch fabricated steel side-discharge deck.

Electric PTO Configuration

The mower uses:

Electric PTO Blade Engagement

allowing the cutting deck to be switched on using an electrical PTO control rather than a mechanical engagement system.

Anti-Scalp Configuration

The 50-inch deck incorporates:

4 Anti-Scalp Wheels

plus:

1 Nose Roller

to help reduce deck contact with uneven turf.

Recommended Lawn Size

Troy-Bilt states that the mower’s large 50-inch deck helps reduce mowing time on areas of:

Up to Approximately 2 Acres.

Actual performance depends on lawn conditions and terrain.

Attachment Configuration

The Super Bronco tractor platform supports compatible tow-behind lawn-care equipment.

Potential compatible attachment categories include:

• Lawn carts
• Spreaders
• Aerators
• Grass collection systems
• Mulching equipment
• Seasonal tractor attachments

Compatible accessories are not included with the base mower unless specifically bundled.

Mulching Configuration

The standard mower is primarily configured for:

Side Discharge

A compatible mulching system may be installed separately when matched to the exact 50-inch deck.

Do not list a mulch kit as included unless your specific retail package contains one.

Bagger Configuration

A compatible rear grass-collection system may be available for the 50-inch tractor platform.

The bagger is:

Not Standard Equipment

and should be presented as an optional accessory unless bundled with the mower.

What’s Included

Standard mower configuration includes:

• 1 × Troy-Bilt Super Bronco 50K FAB XP Riding Lawn Mower
• 24 HP / 725cc KOHLER twin-cylinder engine
• 50-inch fabricated mower deck
• Hydrostatic transmission
• Electric PTO system
• Four deck anti-scalp wheels
• Deck nose roller
• Factory-installed cutting blades
• Operator seat and controls
• Rear hitch / attachment point
• Starting battery
• Product documentation

Optional Equipment – Not Included Unless Bundled

Do not automatically advertise the following as included:

• Mulching kit
• Grass bagger
• Armrest kit
• Hour meter kit
• Lawn cart
• Spreader
• Aerator
• Snow equipment
• Tractor cover
• Additional weights

Troy-Bilt currently sells many comparable Super Bronco accessories separately.

Model Status

The exact:

Super Bronco 50K FAB XP – 13AQA1BLA66

is currently categorized by Troy-Bilt under:

Prior-Year Models.

That does not make the specifications invalid; it means Troy-Bilt has moved to a newer 50K FAB production configuration.

Current Successor – Do Not Mix Specifications

Troy-Bilt currently sells:

Super Bronco 50K FAB – Model 13BQA1BLA66

for $2,999 on its U.S. website as of August 10, 2026.

The current model uses:

24 HP / 747cc KOHLER 7000 Series KT724

instead of the older XP model’s:

24 HP / 725cc KOHLER.

Therefore your product page should keep the following distinction:

Prior-Year XP

13AQA1BLA66

• 24 HP
• 725cc KOHLER
• 50″ Fabricated Deck
• Hydrostatic / K46
• XP designation

Current 50K FAB

13BQA1BLA66

• 24 HP
• 747cc KOHLER KT724
• 50″ Fabricated Deck
• Tuff Torq K46
• No XP in current consumer-facing product name.