Product Description The Troy-Bilt Bronco 42 Riding Lawn Mower is a powerful and comfortable lawn tractor designed to make routine maintenance easier across medium and larger residential properties. It combines a dependable 547cc Troy-Bilt gasoline engine with a wide 42-inch twin-blade steel cutting deck, allowing users to cover more grass with fewer passes. The Bronco 42 is recommended for lawns measuring up to approximately 1.5 acres. Its 42-inch deck provides enough width for efficient mowing while remaining maneuverable around trees, garden beds, pathways and other common landscape features. Unlike a traditional manual gear-drive mower, the Bronco 42 features Troy-Bilt’s AutoDrive transmission. The foot-pedal control allows the operator to adjust travel speed without manually shifting through fixed gears. Pressing the pedal increases ground speed, giving the mower a familiar driving feel and allowing speeds of up to approximately 5.5 mph. Power comes from a rugged 547cc single-cylinder Troy-Bilt engine designed to provide reliable starting, responsive performance and sufficient torque for regular residential mowing. An electric-start system allows the mower to be started conveniently using the ignition key. The durable 42-inch stamped-steel deck uses two cutting blades to produce a clean, even finish. Its standard side-discharge configuration directs clippings away from the mowing path, while an optional mulch kit can be installed to finely process clippings and return them to the lawn. A compatible grass-bagging attachment is also available separately. Two anti-scalp deck wheels help the deck follow changes in the lawn surface and reduce the possibility of cutting the grass too closely on uneven ground. The cutting height can be adjusted through multiple positions to accommodate different grass types, seasonal conditions and preferred lawn finishes. For improved operator comfort, the Bronco 42 includes a supportive mid-back seat, a soft-touch steering wheel and rubberized footpads that help reduce vibration. Its Step-Thru frame provides open access to the operator area, making it easier to get on and off the mower. Automatic headlights improve visibility when mowing in shaded areas or during lower-light conditions. A rear hitch also allows the mower to work with compatible tow-behind lawn accessories, such as carts, spreaders and aerators. Key Features Powerful 547cc Troy-Bilt gasoline engine Convenient electric key-start system Foot-pedal-controlled AutoDrive transmission Maximum forward speed of approximately 5.5 mph Wide 42-inch stamped-steel cutting deck Twin-blade cutting system Standard side-discharge configuration Designed for lawns up to approximately 1.5 acres Two anti-scalp deck wheels Multiple cutting-height positions Mid-back operator seat Rubber footpads to help minimize vibration Soft-touch steering wheel Step-Thru frame for easier access Automatic headlights Optional mulching and bagging capability Rear hitch for compatible tow-behind attachments Durable residential lawn-tractor construction Technical Specifications Specification Details Brand Troy-Bilt Product Series Bronco Product Type Gas Riding Lawn Mower Manufacturer Model 13A878BSA23 Engine Brand Troy-Bilt Engine Displacement 547cc Engine Configuration Single Cylinder Fuel Type Gasoline Starting System Electric Key Start Transmission AutoDrive Transmission Control Foot Pedal Maximum Forward Speed Approximately 5.5 mph Cutting Width 42 inches Deck Construction Stamped Steel Number of Cutting Blades Two Discharge Configuration Side Discharge Anti-Scalp Wheels Two Mulching Capability Yes, with Optional Kit Bagger Compatibility Yes, Sold Separately Recommended Lawn Size Up to Approximately 1.5 Acres Seat Type Mid-Back Seat Frame Design Step-Thru Headlights Automatic Foot Area Rubberized Footpads Rear Hitch Included Recommended Use Residential Lawn Maintenance 547cc Troy-Bilt Engine The 547cc single-cylinder engine is designed to provide smooth, responsive performance during regular lawn maintenance. Its displacement gives the mower enough power to operate the 42-inch twin-blade deck while maintaining consistent travel across typical residential terrain. The electric-start system eliminates manual pull-starting. The operator can start the engine using the ignition key after completing the standard safety-starting procedure. AutoDrive Transmission The AutoDrive transmission uses a foot-pedal control rather than a dashboard-mounted seven-speed selector. This allows the operator to vary travel speed based on pedal input. The system provides several practical benefits: Slower movement around trees and landscaping Faster travel across open sections No need to stop and select fixed gears repeatedly Familiar pedal-controlled driving operation Ground speeds of up to approximately 5.5 mph 42-Inch Twin-Blade Cutting Deck The 42-inch steel deck uses two blades to provide broad and consistent cutting coverage. It is well suited to properties where a compact mower would require too many passes, but a larger 46- or 50-inch tractor may be difficult to maneuver. The deck comes configured for side discharge. Clippings are directed outward through the discharge chute, helping maintain continuous airflow under the deck. An optional mulching kit can be installed to recut clippings into smaller particles. A compatible grass collector can also be added when clipping collection is preferred. Anti-Scalp Deck Wheels Two anti-scalp wheels help prevent the cutting deck from contacting high areas of the lawn. This is especially useful when mowing across gentle changes in elevation or moderately uneven ground. The anti-scalp wheels are intended to support deck protection and should not be adjusted to carry the full weight of the cutting deck continuously. Comfort and Accessibility The Bronco 42 incorporates several features designed to make longer mowing sessions more comfortable: Mid-back seat provides support for the operator Rubber footpads help reduce vibration Soft-touch steering wheel offers a comfortable gripping surface Open Step-Thru frame makes mounting and dismounting easier Foot-pedal transmission reduces repeated manual gear changes Recommended Applications The Troy-Bilt Bronco 42 is suitable for: Residential lawns up to approximately 1.5 acres Medium and larger open grass areas Properties containing trees and landscape features Routine weekly and seasonal mowing Homeowners upgrading from a walk-behind mower Users who prefer pedal-controlled speed adjustment Light towing with manufacturer-approved accessories What’s Included Troy-Bilt Bronco 42 riding lawn mower 547cc Troy-Bilt gasoline engine AutoDrive foot-pedal transmission 42-inch twin-blade steel cutting deck Side-discharge chute Two anti-scalp deck wheels Starter battery Automatic headlights Rear towing hitch Ignition key Operator’s manual Standard assembly hardware Mulching kits, grass baggers, lawn carts and other attachments are sold separately unless specifically included by the retailer.
The Troy-Bilt Bronco 42 Riding Lawn Mower is a powerful and comfortable lawn tractor designed to make routine maintenance easier across medium and larger residential properties. It combines a dependable 547cc Troy-Bilt gasoline engine with a wide 42-inch twin-blade steel cutting deck, allowing users to cover more grass with fewer passes.
The Bronco 42 is recommended for lawns measuring up to approximately 1.5 acres. Its 42-inch deck provides enough width for efficient mowing while remaining maneuverable around trees, garden beds, pathways and other common landscape features.
Unlike a traditional manual gear-drive mower, the Bronco 42 features Troy-Bilt’s AutoDrive transmission. The foot-pedal control allows the operator to adjust travel speed without manually shifting through fixed gears. Pressing the pedal increases ground speed, giving the mower a familiar driving feel and allowing speeds of up to approximately 5.5 mph.
Power comes from a rugged 547cc single-cylinder Troy-Bilt engine designed to provide reliable starting, responsive performance and sufficient torque for regular residential mowing. An electric-start system allows the mower to be started conveniently using the ignition key.
The durable 42-inch stamped-steel deck uses two cutting blades to produce a clean, even finish. Its standard side-discharge configuration directs clippings away from the mowing path, while an optional mulch kit can be installed to finely process clippings and return them to the lawn. A compatible grass-bagging attachment is also available separately.
Two anti-scalp deck wheels help the deck follow changes in the lawn surface and reduce the possibility of cutting the grass too closely on uneven ground. The cutting height can be adjusted through multiple positions to accommodate different grass types, seasonal conditions and preferred lawn finishes.
For improved operator comfort, the Bronco 42 includes a supportive mid-back seat, a soft-touch steering wheel and rubberized footpads that help reduce vibration. Its Step-Thru frame provides open access to the operator area, making it easier to get on and off the mower.
Automatic headlights improve visibility when mowing in shaded areas or during lower-light conditions. A rear hitch also allows the mower to work with compatible tow-behind lawn accessories, such as carts, spreaders and aerators.
| Specification | Details |
|---|---|
| Brand | Troy-Bilt |
| Product Series | Bronco |
| Product Type | Gas Riding Lawn Mower |
| Manufacturer Model | 13A878BSA23 |
| Engine Brand | Troy-Bilt |
| Engine Displacement | 547cc |
| Engine Configuration | Single Cylinder |
| Fuel Type | Gasoline |
| Starting System | Electric Key Start |
| Transmission | AutoDrive |
| Transmission Control | Foot Pedal |
| Maximum Forward Speed | Approximately 5.5 mph |
| Cutting Width | 42 inches |
| Deck Construction | Stamped Steel |
| Number of Cutting Blades | Two |
| Discharge Configuration | Side Discharge |
| Anti-Scalp Wheels | Two |
| Mulching Capability | Yes, with Optional Kit |
| Bagger Compatibility | Yes, Sold Separately |
| Recommended Lawn Size | Up to Approximately 1.5 Acres |
| Seat Type | Mid-Back Seat |
| Frame Design | Step-Thru |
| Headlights | Automatic |
| Foot Area | Rubberized Footpads |
| Rear Hitch | Included |
| Recommended Use | Residential Lawn Maintenance |
The 547cc single-cylinder engine is designed to provide smooth, responsive performance during regular lawn maintenance. Its displacement gives the mower enough power to operate the 42-inch twin-blade deck while maintaining consistent travel across typical residential terrain.
The electric-start system eliminates manual pull-starting. The operator can start the engine using the ignition key after completing the standard safety-starting procedure.
The AutoDrive transmission uses a foot-pedal control rather than a dashboard-mounted seven-speed selector. This allows the operator to vary travel speed based on pedal input.
The system provides several practical benefits:
The 42-inch steel deck uses two blades to provide broad and consistent cutting coverage. It is well suited to properties where a compact mower would require too many passes, but a larger 46- or 50-inch tractor may be difficult to maneuver.
The deck comes configured for side discharge. Clippings are directed outward through the discharge chute, helping maintain continuous airflow under the deck.
An optional mulching kit can be installed to recut clippings into smaller particles. A compatible grass collector can also be added when clipping collection is preferred.
Two anti-scalp wheels help prevent the cutting deck from contacting high areas of the lawn. This is especially useful when mowing across gentle changes in elevation or moderately uneven ground.
The anti-scalp wheels are intended to support deck protection and should not be adjusted to carry the full weight of the cutting deck continuously.
The Bronco 42 incorporates several features designed to make longer mowing sessions more comfortable:
The Troy-Bilt Bronco 42 is suitable for:
Mulching kits, grass baggers, lawn carts and other attachments are sold separately unless specifically included by the retailer.
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