Bronco™ Lawn Tractor

42" AutoDrive Riding Mower / Tractor with Side Discharge

Model No. 13AL78BS023


Where to Buy

The Bronco™ lawn tractor from Troy-Bilt® is a powerful and easy-to-use machine.  This riding lawn tractor has outstanding features like a 19 HP* Single Briggs & Stratton® Intek engine, a foot-pedal-controlled AutoDrive transmission and a 13-gauge steel StepThru® frame.

Bronco Lawn Tractor is rated 4.2 out of 5 by 659.
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  • Foot-Pedal-Controlled Automatic Transmission
  • FastAttach™ Accessories

    Accepts optional FastAttach™ accessories that turn your tractor into a versatile workhorse in just a few minutes. No tools required.

  • StepThru™ Frame
  • 42" staggered side discharge mowing deck
  • All steel construction for heavy-duty performance and added durability
  • 19 HP* Single Briggs & Stratton Intek engine
  • Comfortable mid-back seat
  • Standard cup holder
  • 2-year limited warranty

*as rated by engine manufacturer

  • 42" staggered side discharge
  • 5 position
  • 13-gauge steel
  • Manual
  • Maintenance-free sealed ball bearings
  • 14-gauge steel
  • 2 anti-scalp
  • 19 HP* Briggs & Stratton Intek Single
  • 15 Amp regulated
  • Full-pressure lubrication with spin-on oil filter
  • Foot-controlled automatic CVT
  • N/A
  • 12V / 155 CCA
  • 1.36 gallon
  • Operator-Controlled Reverse System (OCR)
  • Steel
  • StepThru
  • 0 to 5.5 MPH
  • 18"
  • 2 - standard
  • Mid-back
  • 15" x 6" front / 20" x 8" rear
  • 495 lbs
  • 70.5"(L) x 48"(W) x 35.5"(H)
  • Optional FastAttach mulch kit, bagger or bumper available
  • 2-year limited
Rated 4 out of 5 by from Great Purchased about a month ago So happy that I bought this
Date published: 2019-10-21
Rated 3 out of 5 by from Oil Filter I bought a Troybilt Bronco mower about 3 years ago. The first time I did an oil change, the filter was so tight I could not remove it. I took it back to Lowe's and the service guy said he had to use a hammer and chisel go get the filter off.
Date published: 2019-10-20
Rated 5 out of 5 by from dependable This is our second bronco and it has not disappointed us. It starts right up and mows smoothly. Yes would buy another if needed. Great product.
Date published: 2019-10-19
Rated 4 out of 5 by from Mows well, runs great. Love everything about our new Troybilt mower, with three exceptions. 1. Has a place for attaching a hose to clean the deck, but there is no actual fitting, and I can't find anywhere to order it. 2. A cruise control so you do not have to hold the CVT pedal down. Our Craftsman mower was fabulous, cruise and go. The new machine wears my wife and I out rapidly. 3. Toy-sized gas tank. Really?
Date published: 2019-10-19
Rated 5 out of 5 by from Smooth Ride Extremely happy with the way it rides very smooth, cuts amazing, the best decision I made when it came to purchasing a lawn mower!
Date published: 2019-10-18
Rated 1 out of 5 by from Terrible. Constantly replacing mower blades because they are thin and bend when even hitting the smallest stick. Transmission is now slipping, after only 1 1/2 seasons. Deck is very flimsy and requires the occasional hammer to straighten the spindle mounts back up.
Date published: 2019-10-13
Rated 4 out of 5 by from Very dependable and easy to access mechanics. I bought used and was specifically looking for TroyBilt. I've been very happy with my purchase.
Date published: 2019-10-11
Rated 5 out of 5 by from Arrived early. Was easy to put together ! Bought a month ago for the fall clean up, also purchased a bagger. It picks up the leaves really well,
Date published: 2019-10-07
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Operator's Manuals Disclaimer

Important Information - Please Read Carefully

The Operator's Manual is an important part of your new outdoor power equipment. It will help you assemble, prepare, maintain and safely operate your machine. Your outdoor power equipment was built to be operated according to the rules and instructions for safe operation which are contained in the operator's manual and on the machine itself.

Safety rules and instructions, if not followed, could endanger the personal safety and/or property of the operator and others. Read and follow all instructions in the manual before attempting to operate your outdoor power equipment. As with any type of power equipment, carelessness or error on the part of the operator can result in serious injury. Your machine is capable of amputating hands and feet and throwing objects. Failure to observe the safety rules and instructions, both on the machine and in the Operator's Manual, could result in serious injury or death.

IMPORTANT: Troy-Bilt, its parents, affiliates and subsidiaries, is concerned about the safety of its customers and others. Due to the size of the Operator's Manual, some Operator's Manuals are broken down into two or more segments so that the entire Operator's Manual can be downloaded easily. Cub Cadet is requiring all those who wish to download a copy of the Operator's Manual to acknowledge that he/she will download the portion of the Operator's Manual that contains the Important Safe Operation Practices section, as stated below. This is to ensure that this section is reviewed and accessible when operating, servicing and/or maintaining the machine.


By clicking "I ACCEPT" below, you certify that you have read and accepted the above notice.

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