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 545.
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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 Solid tractor so far I bought this tractor about a month ago, & am very happy with it so far. Well built, runs great, does a great job of doing an even cut on the lawn, handles well, comfortable ride, the reverse mowing process is pretty easy & works great. So far, I have only found 2 small changes I would make. 1, I would have some type of hold down for the hood. I don't like that it doesn't fasten to the body. Just my taste. I would also have some way to pick up the plastic side discharge chute other than leaning way down to hold it up by hand, for when I put it in the garage or have to mow right up next to an obstacle like a flower bed or building. I will probably jury rig some type of bunge cord to the chute so I can pick & hold it up as needed. Again, just my taste. Other than those 2 nitpicky things, I am very happy with my choice.
Date published: 2019-06-28
Rated 5 out of 5 by from Cuts great I bought the Bronco 42" rider about a month ago. Happy with it so far. Installed the mulch it and it works nice. The only thing so far I wish there was an option to turn the headlights on and off while it is running.
Date published: 2019-06-25
Rated 5 out of 5 by from Impressed First new tractor I ever bought (always 2nd hand ones before) Always thought competitors products were better. I was greatly mistaken used it for the first time today my yard has never looked better. My hats off to the engineers for designing a quality product look forward to years of service but when the time comes I will looking to Troy Bilt
Date published: 2019-06-05
Rated 4 out of 5 by from Expected Performance Only been a relatively short (one month) time, but my 'Bronco' operates flawlessly as I expected from a Troy-Bilt product. So far, so good!
Date published: 2019-06-05
Rated 1 out of 5 by from love the mower love this mower , 2nd one I've bought in 4yrs.1st one , the blade spindle dropped. bearings I guess gave out . had warranty , got fixed but took 2 weeks . 2 months later , same problem .this time warranty an shop claimed I hit something . had fixed , but I had to pay . bought a second mower , because I cant go 2 weeks without cutting . now after 1 yr. 9 mo. the second one is grinding an blade an spindle are shaking . its fixing to fall out just like last mower . I need a mower that's gonna last more than 2 yrs. I looking now for that mower !
Date published: 2019-04-28
Rated 5 out of 5 by from Bronco Great mower. Wish there was a way to lock the differential. Wis there was a way to lower pressure required for the pedal
Date published: 2018-11-04
Rated 5 out of 5 by from Tough as an old Ford pickup truck! I'm not the most careful user and my 2011 Bronco has a number of dents and dings. I keep the Kohler engine serviced though, and the lube points oiled/greased, but I don't worry much about its appearance. The engine purrs, the deck cuts smoothly, and the machine steers easily. Like I said, it's like the old '48 Ford pickup my uncle had on his farm -- looks like heck, runs like a Swiss watch.
Date published: 2018-10-17
Rated 5 out of 5 by from really like it Troy Bilt Bronco Automatic (CVT Drive) 42” deck Kohler 17hp(597cc) Engine. Purchased 06/2016. It's now 10/2018 so I'm ending my 3rd mowing season with it. Over all I'm very happy with it. Mows well and have not had any problems to speak of. One BIG plus I like about it is with the CVT Transaxle it mows in reverse the same speed as forward. With a gear drive reverse is very slow. If you have to do much backing up this is a great improvement. I selected this mower due to price and what you get for the money. I felt it was a better value than other brands I looked at plus I wanted to try a kohler Engine, we'll see how this Kohler compares over time to other small engines I've owned. Also this engine has a replaceable oil filter, that's a plus, many of other engines don't. The con's for this mower was Con.1. the engine throttle set up, in order to start the engine with choke you had to start cold engine under full throttle, which is NOT a good thing. It was easy to modify the linkage, separating the throttle/choke, add a separate choke cable enabling starting at low RPM with choke. Con 2, The engine start switch that required moving the switch to the second run position and pushing a button until a LED came on to enable mowing in reverse was a big aggravation especially since I had a tendency to forget it till I reversed and killed the engine. But once I figured out the wiring setup it was easy to disable, now I don't have to contend with that silliness any more. All newer mowers have some form of this so called safety feature. I was a little apprehensive about the CVT transaxle not ever owning one before but so far I like it. After selecting forward or reverse you have one peddle on the right, more you push it down faster you go,let up to slow or stop. Makes it quick and easy to change mowing speed to suit grass conditions. Another plus for this mower is it has a very short turning radius that's good for getting in close around trees, shrubs etc. This has reduced how much time I spend trimming up with push mower. So far I really like the mower and would recommend it. I maintain a little over one acre of lawn with it. The only accessories I have for it is a mulching kit that contains a baffle plate to cover the discharge and a set of mulching blades for fall of the year to mulch leaves.
Date published: 2018-10-15
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Special Financing

The Bronco Lawn Tractor qualifies for financing! Call 800-828-5500 for financing details and to apply.

Click here for details

Shipping Details

Whole Good Delivery

Truck freight companies DO NOT require their drivers to unload shipments. Please make arrangements to have extra help on hand in these circumstances.

If the shipping company needs to make special arrangements to unload merchandise for customers, such as special lift-gate truck delivery or extra delivery personnel, it is the responsibility of the customer to reimburse the trucking company for these charges. Troy-Bilt will not be responsible for any such additional charges.

Some municipalities and some delivery areas prohibit truck freight delivery in residential areas. In these circumstances, customers may have to arrange picking items up at the local trucking distribution center. Troy-Bilt will not reimburse customers for any such expenses.

Please inspect the product carefully and thoroughly BEFORE signing the shipping receipt. Shipping damage is covered by the truck freight company and not by Troy-Bilt. Your signature on the receipt is your acceptance of the merchandise in good condition.

Whole Good Return Policy

NEW AND UNUSED equipment may be returned, at customer's expense, for a period of 14 days after the date of delivery. Once an order has been processed for shipment, it is considered shipped and can not be cancelled; only returned. Also, once a unit has had fuel put into the fuel system it is considered "used" and non-returnable. All returns on whole goods are subject to a restocking fee of up to 25% of the purchasing price and the shipping is non-refundable.

* Please read and review these special considerations BEFORE ordering items that require truck freight delivery. Truck freight companies DO NOT require their drivers to unload shipments. Additional expenses may be charged to the customer if special arrangements need to be made by the shipping company to unload merchandise. Troy-Bilt will not be responsible for any such additional charges.

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.


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