AS 920 Sherpa 2WD B&S

Fast and agile ride-on mower with limited slip differential for moderate inclines

The AS 920 Sherpa 2WD boasts work rates reaching 9,450 m² per hour, thanks to its 90 cm cutting width and a high-power Briggs & Stratton 2-cylinder engine with 724 ccm displacement and up to 27 hp. The closed, surfing mower deck gives way upward which protects both the blade and the turf, as the blade will not come into contact with the ground. Moreover, the shape of the mower deck allows flush, close-to-the-edge mowing. The AS 920 Sherpa 2WD has a turning radius of just 65 cm.

The AS 920 Sherpa 2WD’s cross-blade system delivers impressive mulching results in grass and dense growth up to 1.5 meters high. Bearing-supported blades cut the grass while a mulching blade positioned above them shreds the cuttings, which are then deposited between the wheels for added safety on slopes and wet grass. Cutting heights can be adjusted to 5 levels from 35–135 cm with an optional mulch kit available for even finer mulching results.

Convenient drive operation with added safety

Hydrostatic transmission allows the precise adaptation of speed to match the terrain, reaching 10.5 km/h and 8.2 km/h in reverse. Just one lever controls the drive, brake and parking functions for easy operation, while limited slip differential can be activated for excellent propulsion and traction when needed.

Comfort meets stability

With a highly stable tubular frame, the AS 920 Sherpa 2WD performs even under harsh conditions. Operators up to 1.9 m tall can operate the machine comfortably thanks to a length-adjustable seat and seat spring package. A low centre of gravity, folding bar and branch deflectors are added safety features, while lashing points integrated in the frame enable secure transport.

Designed for continuous operation

Two separate ventilation circuits for the engine and hydrostatic transmission prevent overheating: the engine takes in air from above and discharges it to the side, while the hydrostatic transmission takes air from the rear and discharges it downward. This system ensures a long service life.

New model year 2024

In the future, the 2WD models of the Sherpa series will appear in new splendor. Visually, the new Sherpa models are even more attractive with a new paint finish, an additional front panel and the newly designed decals. But the legendary tallgrass mowers also offer a number of technical innovations.

In addition to more volume (17 liters), the Sherpas’ new fuel tank offers a larger tank opening and a level indicator as standard. The protective cloth between the engine and seat can now be easily opened for service activities using a magnetic catch. Accessibility to the engine, for example when changing the oil, is significantly improved. The locking mechanism of the folding handle has been redesigned and prevents elbow bumping.

Product advantages

Surfing mulch-mower deck

Closed mower deck with AS cross-blade system. The main blade cuts, the cross-blade chops the cuttings. The surfing mower deck gives way upward on uneven terrain to protect against damage.

Ergonomic sitting position provides excellent driving comfort

Length-adjustable driver seat, innovative seat suspension and ergonomic sitting position provide comfort for tall operators during long work periods.

Small turning radius, high work rate

The turning radius of just 65 cm provides agility even on difficult terrain.

Stable tube frame

High stability and torsional rigidity with heavy load.

Terrain with moderate inclines

Performs on moderate inclines thanks to a low weight and low centre of gravity.

Variable hydrostatic transmission (ride-on mower)

Easy adaptation of the speed to every terrain with integrated, mechanical parking brake in the drive lever.

Stable, folding bar

Greater operator safety in the machine's limit area.

Product details

AS mulching mower deck

Closed, surfing mower deck with cross-blade system and bearing-supported blades that yield to obstacles.

Separate air cooling supply

Separate engine air cooling and hydrostatic transmission optimize performance.

Switchable limited slip differential

Comfortable activation of the limited slip differential via foot pedal for excellent propulsion and traction.

Stable, folding bar

Greater operator safety in the machine’s limit area.

Technical Data

cutting width 90 cm
engine manufacturer B&S
engine designation Professional Series 8
4-stroke engine, 1-cyl. / 2-cyl. /
displacement 724 cm³
maximum power 20,1/27,0 kW (hp)
rated power 16,5/22,4 kW (hp)
rated speed 3300 rpm
drive, 2WD rear / 4WD permanent /
drive, variable hydrostatic transmission
max. speed 10,5 km/h
limited-slip differential
automatic parking brake
mono-blade / cross-blade / Y-flails / /
side discharge / rear discharge /
closed mower deck
surfing mower deck
cutting height 50 - 105 mm
tank capacity 17 l
seat spring package, standard / optional /
dimension L/W/H 191x98x152 cm
weight 280 kg
Changes in technology, equipment and price are reserved. Of information or illustrations no claims can be derived.


Insect scare device

Scares insects and small animals away from the mower. Three times more insects can flee in time. With respective adapters suitable for AS 62/63, AS 701/901, AS Sherpa and AS YAK.

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Cargo area: L = 1071 mm, W = 607 mm, panel height: 274 mm. Permissible total weight: 100 kg. Rear panel can be removed.

Trailer hitch (Sherpa)

For connecting the AS trailer.

Snow blade

Width: 1107 mm, height: 348 mm. Adjustable on both sides.

Mulch kit (Sherpa)

For even finer mulching and more uniform cutting results on lawns with grass up to 40 cm high.

Snow chains

Cross-track chain for the drive wheels.

Twin wheels (Sherpa)(Old)

One pair (2x2) of rear twin tyres with extreme tread pattern for highest traction.

Tilt meter

Convenient display of slope incline.

Steering knob

Facilitates one-handed steering and maoeuvring on level terrain.

Liquide tyre sealant “Plattfuss-Stop”

Reduces the failure times due to flat tyres (950ml)

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Liquide tyre sealant “Plattfuss-Stop”

Reduces the failure times due to flat tyres (20 litres); can only be used in conjunction with the pump

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Pump for tyre sealant

For filling the tyre sealant "Plattfuss-Stop"; only necessary in conjunction with 20 l container

Spacer Sherpa

Spacer for replacing the upper mulching blade. Advantageous in fibrous vegetation or for higher mowing speed in dense vegetation.

LED headlights

Two high power 18W LED headlights, with mount, switch and cable.

Customer reviews

AS 920 Sherpa 2WD: this machine has become our regular helper for landscaping in our "bird paradise". It has met our high expectations at bird conservation organisation SOS Birdlife; it is easy to control and handle. It can also handle more demanding terrain and longer working hours, and it doesn't mind getting its wheels dirty at all!
– Zuzana Mace Zemáneková (Project Manager at SOS Birdlife Slovensko, Slovakia)


Commercial landscaping

Performance on rough terrain, perfect cutting results and high efficiency are advantages AS-Motor machines provide to professional service providers.

Solar parks

Efficiency is crucial to maintaining a profitable solar park. AS-Motor offers the ideal tools to properly maintain the green areas around and under solar panels.

Gardening and landscaping

AS-Motor’s professional technology offers solutions for the diverse tasks of gardening and landscaping, from outdoor facilities to private gardens, public parks and residential lawns.

Meadow orchards

Meadow orchards characterize the landscape of diverse regions and provide valuable ecosystems for insect and bird life. Maintaining these areas often involves mowing around trees, on slopes and in rough terrain.

Municipal maintenance

Caring for green areas in the civic environment involves a variety of tasks. From parks to roadside management, AS-Motor provides the correct tools to ensure both professional results and operator safety.

Athletic facilities and golf courses

Management of edge areas, embankments and lawns of athletic facilities are as important as the greens themselves.

Equestrian businesses

Equestrian areas require various forms of green care. Whether maintaining paddocks or lawns, AS-Motor offers tools to create the ideal equestrian environment.

Hunting and forestry

In forests and on hunting grounds, mowing can take place as infrequently as once per year or even at intervals of several years. AS-Motor machines are engineered to tackle the thick growth native to these areas as well as Christmas tree plantations.

Leisure facilities

Leisure facilities must be visually appealing and expertly maintained. Whether parks or campsites, these areas are frequently used and thus require careful maintenance.

Road maintenance

Maintaining roadways often involves mowing high grass and slopes, two specialties of AS-Motor’s professional technology.


AS-Motor offers professional technology for the maintenance of green spaces in and around public utility facilities.


Viticulture, or wine-growing, is one of civilization's oldest forms of agriculture. AS-Motor was founded 60 years ago with the objective of tackling the slopes and thick growth of vineyards.