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Grasshopper Mowers

Grasshopper 729BT

Grasshopper 729BT

Regular price $14,879.00 USD
Regular price $17,355.00 USD Sale price $14,879.00 USD
Sale Sold out
Deck Options
Seat Options
ROPS Options

Take advantage of maximum productivity and versatility with the Grasshopper Model 729BT riding lawn mower. 

Out front mowing decks reach under low-hanging obstacles to reduce string trimming needs. Take advantage of zero-turn maneuverability and powerful performance that meets the demands of rugged daily use, while providing superior operator comfort. Use the PowerFold® deck lift/electric height adjustment feature to raise the deck for cleaning the underside. Cutting decks also remove to add a variety of turf renovation and snow removal implements.

B&S Vanguard Big Block

  • 29 Horsepower Briggs & Stratton Vanguard Big Block OHV V-twin engine with horizontal crankshaft for longer life

PowerFold® Electric Deck Lift

Standard on all FrontMount™ DuraMax® decks, PowerFold® is the zero-turn mower industry's first electric deck lift (introduced in 2004).

PowerFold® rotates the deck nearly 90 degrees to provide easy access to the underside of the deck for simplified maintenance and mulching package installation, plus space-saving portability and storage.

The feature also adjusts cutting height between 1.25 and 5.0 inches and controls deck lift functions using a single switch.

Heavy-duty Deck

  • Extra-deep, 5.5-inch deck is fabricated from heavy-gauge formed steel with a reinforced anvil edge
  • Specially designed cutting chambers enhance airflow for better cut quality
  • Deck easily converts from side discharge to optional Down Discharge™ mulching or PowerVac™ collection
  • Sentry™ spindles with massive, 8-inch flanges anchored in a 6-bolt pattern, spread the force of impact for greater strength
  • Spindle planes are fabricated from double-layered formed steel laminate and combine with the spindles to form a triple-strength deck to keep blades level and deliver a high-quality cut.
  • Sentry™ spindle guards shield spindle housing and seal lower bearings from fiber wrap and dirt ingestion

Minimal Maintenance

  • Fewer than 10 grease points and easy top-side access to belts and filters
  • 1,000-hour transmission fluid change intervals
  • Self-tensioning belts minimize cost and labor on routine maintenance

    T6® Drive Hydrostatic Transmission

    • Tandem 16cc Parker pumps-in-reservoir transmission with design-matched Parker high-torque wheel motors
    • In-line CoolFan™ cooling system for cooling efficiency and long service intervals
    • Delivers smooth response and requires less maintenance, with industry-leading 1,000-hour fluid change interval

    QuikConverter™ Implement Capability

    • Add or remove implements in minutes without tools with QuikConverter™ Implement System
    • Equip your out-front mower with a wide range of tools, including turf cleanup, renovation and snow removal implements that extend your productivity year-round

    AntiVibe Power Platform®

    Isolates the engine and T-Drive™ from the operator platform for an unprecedented vibration-free experience

    Vigilant Operator Presence System™

    • Standard, low profile Roll-over Protection System (ROPS) structure with an adjustable seatbelt
    • Dampened steering levers that return to neutral from forward and reverse
    • Interlock switches that shut down the engine when the operator leaves the seat while PTO is engaged or levers are in drive position

    Built for Long Life

    • Robotically-welded, high-grade steel construction and I-beam reinforcement for long-lasting durability
    • Centered-bearing design provides greater load-bearing capacity to easily handle the weight of operator, fuel and high-capacity collector with reserve strength for curb shocks and weight shifts
    • Tough-as-nails powder-coated finish is fusion-bonded for chip and rust resistance

    LED Work Lights

    LED work lights provide improved visibility in low light situations.

    Ultimate Operator Station™

    • The deep-cushioned, deluxe Premium Comfort Seat features a coil-spring suspension and padded lumbar support for all-day comfort. Iso-mounting eliminates vibration before it reaches the seat, and both padded seat and armrests are covered in scuff-resistant, breathable CoolTemp Cordura® fabric, which dissipates heat and won’t tear or crack with extended use.
    • Operational controls including throttle, ignition and push/pull PTO switches, angled View-Eze™ console and adjustable cup holder are well positioned for visibility and ease of reach.
    • One- or two handed operation with QuikAjust Tilt™ dual levers with 9-inch comfort range to custom fit operator's reach. Levers automatically return to neutral from either forward or reverse position and are less strenuous than riding mowers with steering wheels.



    B&S Vanguard Big Block, V-Twin

    54.7 cu. in. (896 cc)

    Lubrication System
    Pressure Lube/Filter


    Cooling System

    Gasoline - unleaded

    Fuel Capacity
    7.2 U.S. Gal. (27.3 l)

    Optional Fuel Capacity

    Air Cleaner
    Heavy-duty, remote mounted, cyclonic, dual element air filtration.

    Ultra quiet, single, industrial type



    Mulching Package #
    504567(52), 504569(61), 504571(72)

    – 52" Deck
    – 61" Deck
    – 72" Deck

    1.25 to 5.0 in. (3.2 cm to 12.7 cm)

    CONSTRUCTION (Robotic-welded steel)
    Tubular 2.25 in. x 4 in. boxed members with 0.25 in. gussets. Formed double thickness hardened steel (0.269 in. 7.6% thicker than 0.25 in. (6.35 mm)) truss spindle plane and (3) Sentry™ spindles and a triple-strength upper deck, 1/2 inch thick in stress zones. Geometrically engineered design with 7 gauge skirts to withstand the brunt of commercial mowing.

    BLADES (Tempered, alloy steel)
    – 52" Deck
    (3) 18 in. (45.7 cm)
    – 61" Deck
    (3) 21 in. (53.3 cm)
    – 72" Deck
    (3) 25 in. (63.5 cm)

    Sentry™ Spindle System, 2.5 cm (approx. 1 in.) O.D. shaft. Double bearings greasable from top of deck. Spindle head designed to eliminate fiber wrap. Spindle cones shield housing and lower bearings from fiber wrap and dirt ingestion.

    8 in. (20.3 cm)-diameter machined aluminum housing with 6-bolt pattern.

    Maintenance-free gearbox with single Kevlar V-belt and idler arm tensioning.

    TRIMABILITY (Outside of std. tire to left trim side)
    – 52" Deck
    1.0 in. (2.5 cm)***
    – 61" Deck
    8.5 in. (21.6 cm)***
    – 72" Deck
    13.75 in. (34.9 cm)***


    Battery (maintenance-free)
    12 Volt

    Solenoid shift


    Interlock System
    Prevents engine start when PTO clutch is engaged or steering levers are in drive position. Allows operator dismount without engine shutdown only when PTO is disengaged and steering levers are locked in neutral.


    Iso-mounted Premium Comfort Seat. Features include a high-back, deep-cushioned, foam-padded Cordura®-covered, padded arm rests, padded backrest with lumbar support, coil-spring suspension and embroidered Grasshopper logo on seat back.

    AntiVibe PowerPlatform™ with iso-mounted seat and footrest

    Console-mounted Instruments
    Low engine oil pressure and parking brake warning lights, digital hour meter, work lights, ignition and push/pull PTO switches. Choke integrated with throttle lever.

    Work Lights
    Standard - LED

    Hour Meter


    T6® hydrostatic transmission with tandem 16 cc Parker pumps-in-reservoir, in-line CoolFan™ for cooling efficiency, design-matched Parker high-torque wheel motors. AntiVibe Power Platform® reduces vibration for the operator.

    Filtration/Hydro Fluid
    Integrated, replaceable, high-efficiency, fine-particle filter / Grasshopper CoolTemp Hydro-Max™ fluid withstands high and low temperature extremes for 1,000 hour change intervals.

    0 - 10.0 mph (0 - 16.1 kph) forward 0 - 6.0 mph (0 - 9.7 kph) reverse

    Turning Radius
    True zero degree, turns within own length with counter-rotating, independently powered drive wheels. Seat is pivot point.

    One- or two-hand operation with adjustable HydraSmooth™ QuikAjust Tilt™ dual levers with 9-inch adjustment for a custom fit that automatically return to neutral from either forward or reverse position.

    Dynamic braking through hydrostatic transmission.

    Parking Brake
    Disc parking brakes, one for each drive wheel.

    Attachment Drive
    Telescoping PTO shaft with two high-speed U-joints, Quik-D-Tatch® coupler and heavy-duty electric Mag Stop® blade clutch/brake.


    Drive Wheels – Standard (4-ply rated)
    22x11.00x10 bar tread, high flotation, 4-ply rated

    Drive Wheels – Optional (4-ply rated)
    22 x 11.00-10, turf tread, 4-ply rated
    22 x 11-12 Michelin® X® Tweel® airless turf tread

    Single Tail Wheel
    13x6.50x6 rib tread, pneumatic (2)

    Wide Stance Single Fork Tail Wheel

    Deck Tires (4-ply rated)
    – 52" Deck
    9x3.50x4 (flat proof), 4-ply rated
    – 61" Deck
    11 x 4.00-5 (flat-proof), 4-ply rated
    – 72" Deck
    13x6.50x6 rib tread, pneumatic, 4-ply rated


    Height (Seat Back)
    47.0 in. (119.4 cm)

    Height (Seat Cushion)
    30.5 in. (77.5 cm)

    Height (ROPS)
    69.0 in. (175.3 cm)

    Length (frontmount w/ DuraMax® Deck - Mowing Position)
    – 52" Deck
    105.5 in. (268.0 cm)
    – 61" Deck
    107.5 in. (273.0 cm)
    – 72" Deck
    117.5 in. (298.5 cm)

    Length (FrontMount Power Unit + DuraMax® Deck - Folded Up)
    – 52" Deck
    88.5 in. (224.8 cm)
    – 61" Deck
    91.0 in. (231.1 cm)
    – 72" Deck
    104.0 in. (264.2 cm)

    Deck Width (Side Discharge)
    – 52" Deck
    65.5 in. (166.5 cm)
    – 61" Deck
    74.5 in. (189.2 cm)
    – 72" Deck
    85.5 in. (227.3 cm)

    Deck Width (Mulch*)
    – 52" Deck
    53.5 in.* (135.9 cm)
    – 61" Deck
    62.5 in.* (158.8 cm)
    – 72" Deck
    73.5 in.* (186.7 cm)

    FrontMount PowerUnit Only (Width/Length)
    50.0 in. (127.0 cm)/67.0 in. (170.2 cm)
    FrontMount Power Unit (Wheelbase)
    51.5 in. (130.8 cm)


    – 52" Deck
    1300 lbs. (589.7 kg)
    – 61" Deck
    1350 lbs. (612.3 kg)
    – 72" Deck
    1475 lbs. (669.0 kg)

    FrontMount Power Unit Only (uncrated)
    930 lbs. (421.8 kg)

    FrontMount Deck Only - Side Discharge (uncrated)
    – 52" Deck
    370 lbs. (167.8 kg)
    – 61" Deck
    420 lbs. (190.5 kg)
    – 72" Deck
    545 lbs. (247.2 kg)

    Mulching Package
    – 52" Deck
    29 lbs. (13.2 kg)
    – 61" Deck
    36 lbs. (16.3 kg)
    – 72" Deck
    44 lbs. (20.0 kg)


    • Commercial Use: 3-year unlimited hours; limited warranty: First two years covering parts and labor; third year covering parts only.
    • Residential Use: 4-year or 800-hour (whichever comes first); limited warranty covering parts and labor.

    Options & Accessories

    PowerVac® FrontMount Collection System

    Powerful, deck-driven PowerVac™ collection systems deliver one-pass perfection every time, and are available with a wide range of twin or triple mesh bag or high-capacity metal hopper collectors.

    Dedicated Rear Discharge Decks

    Dedicated, extra deep rear-discharge decks deliver revolutionary performance for applications where keeping clippings off sidewalks, driveways and parking lots is critical.

    Armrest Height Adjustment Switch

    Used in conjunction with PowerFold® electric deck lift/height adjustment, this armrest-mounted switch controls deck lift functions and adjusts cutting height between 1.0 and 4.5 inches on the go.

    Rear Discharge Shield Kit

    Optional rear discharge shield kit converts 34R Series decks to direct clippings out the back of the deck for a smooth cut and no windrowing.

    SpeedTrimming™ Roller Kit

    The optional SpeedTrimming™ heavy-duty, anti-scalp roller kit for 52-inch and larger DuraMax® decks speeds close trimming near buildings, fences retaining walls and other landscaping features. Kits available for both left and right sides of cutting decks.

    Full Flotation Deck Inserts

    Allow for controlled side-to-side flotation of the deck in rolling terrain for a smooth, even cut.

    Hydraulic Deck Lift

    Raises the front of the deck to maneuver over soft or uneven ground and to clear curbs, trailer ramps and other obstacles. Lift switch is standard in lever on current models. Kit includes Universal Wiring Harness and requires 50-lb. counterweight and counterweight mount kit.

    QuikConverter® Implements

    Every FrontMount™ mower accepts a range of time- and labor-saving QuikConverter™ implements for even greater flexibility and productivity year-round.

    Your Choice of Decks

    52-, 61- or 72-inch 34 Series DuraMax® and 61-inch 36 Series (3661) side-discharge decks easily convert to Down Discharge™ mulching or PowerVac™ collection. All come standard with PowerFold® electric deck lift/height adjustment.

    52-, 61- or 72-inch 35R Series and 61-inch 37R Series (3761) dedicated rear discharge decks come standard with PowerFold® electric deck lift/height adjustment

    Air Dam Kit

    An optional Air Dam Kit can be installed along the front edge of most mower decks to minimize dust and dirt escaping from the front of the mower.

    Wide Seat Conversion Kit

    Provides additional seating room for larger operators or to accommodate cell phones or pagers. Requires seat belt extension.

    Filter Minder

    The Filter Minder alerts the operator when airflow is restricted in the air canister on dual-element air filters.

    WeatherBeater® Winter Enclosure

    The full-view metal cab keeps moisture out and heat inside to keep the operator comfortable and productive. Standard electric windshield wiper clears windshield during operation. Powerful LED lights light up your path. Counterweight required.

    Tail Wheel Options

    Dual-fork tail wheels or wide stance single-fork tail wheels.

    Yellow Beacon Light

    Yellow beacon attaches to OPS to provide greater visibility in high-traffic areas.

    Premier Suspension Seat

    Optional premier suspension seat provides the ultimate in operator comfort. Low-profile seat slides fore and aft and includes an integrated shock absorber that manually adjusts to operators between 100 – 300 lbs. Other ergonomic features include a backrest that tilts from -5 degrees to +30 degrees, a lumbar support mechanism, adjustable armrests and a retractable seat belt.

    Sunshade Canopy Vinyl


    Lightweight, water repellent, UV-resistant vinyl canopy mounts easily to OPS or ROPS to limit exposure to direct sunlight, reducing eye strain and increasing operator comfort.

    Down Discharge™ Mulching Package

    The optional Down Discharge™ mulching package with GrassMax™ High-Low Mulching blades cuts and recuts clippings and directs them deep into the turf, enriching turf and producing a beautifully manicured cut.

    Extended Steering Levers

    Provides an additional two inches of leg clearance.

    Sunshade Canopy Aluminum

    Diamond-plated aluminum canopy is highly resistant to abrasions. Mounts to ROPS or OPS to increase operator comfort by limiting exposure to direct sunlight and reducing eye strain. Canopy tilts up and down to accommodate operator’s size. Optional cooling fan and LED light kit increase operator comfort and visibility.

    Side Discharge Control Kit

    Control the discharge of the mower deck to avoid putting clippings in flower beds and on sidewalks

    Michelin® X® Tweel® Airless Tail and Deck Wheels

    Smooth tread, 13x6.50x6 tail wheel. Performs like a pneumatic tire, but without the inconvenience and downtime associated with flats. Also available for 72-inch deck wheels. Not for use with PowerVac Collection Systems.


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