Troy-Bilt Bronco 42 specs

Lawn tractor · Troy-Bilt · 1 variant · Last verified 2026-10-26

42 in.Deck width
CVTTransmission
1.36 galFuel tank
MTD 547cc OHV vertical shaftEngine
None foundCPSC recalls

Specifications

Each value links to the manufacturer document and page it came from. “Not yet verified” means we hold a reading that has not passed our checks, so we do not show it. A dash means the sources we used do not publish it.

Engine

Troy-Bilt Bronco 42 Engine
Engine makeTroy-Bilt[product page]
Engine model4X90H0[product page]
Displacement547 cc[product page]
CylindersSingle[product page]
Air filter typeSingle element[product page]

Mower deck

Troy-Bilt Bronco 42 Mower deck
BladesTwo[product page]
Deck constructionStamped[product page]
Cutting height range1.5” - 3.75” in.[product page]
Deck material13-gauge steel[product page]
Cutting height positions5[product page]
Blade engagement (PTO)Manual lever[product page]
Deck width42 in.[product page]

Drivetrain

Troy-Bilt Bronco 42 Drivetrain
Transmission typeCVT[product page]
Steering / drive controlFoot Pedal[product page]
Max forward speed5.5 mph[product page]
Max reverse speed2.5 mph[product page]

Fuel

Troy-Bilt Bronco 42 Fuel
Fuel tank capacity1.36 gal[product page]

Tires and wheels

Troy-Bilt Bronco 42 Tires and wheels
Front tires15"x 6"-6"[product page]
Rear tires20"x 8"-8"[product page]

Dimensions and weight

Troy-Bilt Bronco 42 Dimensions and weight
Turning radius18 in.[product page]
SeatMid-back[product page]

Warranty

Troy-Bilt Bronco 42 Warranty
Residential warranty3-year limited[product page]

Variants

Each SKU, model number, deck option and serial-range revision is its own variant. Values are never merged across variants.

13A878BSA23

Bronco 42 (model 13A878BSA23)

Model numbers
13A878BSA23
Engine
MTD 547cc OHV vertical shaft

Engine

MTD 547cc OHV vertical shaft is linked to variant 13A878BSA23 because the engine model is printed on a manufacturer document for this machine. Full maintenance specs, parts and every machine using it are on the engine page.

MTD 547cc OHV vertical shaft key specs
Displacement547 cc[engine manual p.1]
Oil typeSAE 10W-30[engine manual p.5]
Spark plug gap0.024-0.031 in (0.61-0.78 mm)[engine manual p.11]

Maintenance specs and parts

Oil and service specs

Troy-Bilt Bronco 42 service specs
Engine oil capacity1.8 qt (1.7 L)[product page]

Engine service parts (from MTD 547cc OHV vertical shaft)

MTD 547cc OHV vertical shaft parts
Oil filter951-12690[engine manual p.14]Find this part: MTD Parts Amazon Sears PartsDirect
Air filter937-05066[engine manual p.14]Find this part: MTD Parts Amazon Sears PartsDirect
Fuel filter951-3013[engine manual p.14]Find this part: MTD Parts Amazon Sears PartsDirect
Spark plug951-10292A[engine manual p.14]Find this part: MTD Parts Amazon Sears PartsDirect

Serial tag location

Serial tag location
Serial tag locationModel plate: lift the seat and look under the seat pan[manual p.1]

Manuals and sources

All links go to the manufacturer. Dates are printed dates unless marked otherwise.

Sources we could not obtain

Recalls

CPSC recalls for Troy-Bilt Bronco 42

No CPSC recall found as of 2026-10-26. Search CPSC

Engine MTD 547cc OHV vertical shaft: No CPSC recall found as of 2026-10-26.

A listed recall usually covers only the serial, spec or model numbers in the CPSC notice; check your machine. Try the recall lookup.

Last verified against manufacturer documents: 2026-10-26. Spotted an error? See contact.