AS 73 4T B&S

The only meadow mower with two blade speeds

The Allmäher for professional use in challenging conditions. Equipped with a Briggs & Stratton Series 3 INTEK engine with an oil and fuel pump, the AS 73 4T B&S masters inclines up to 35 degrees without running the risk of engine damage. A separate engine and blade shaft protect the engine in case of unseen obstacles and propulsion occurs via a 5-speed manual transmission with reverse gear (2.4 km/h) that covers a speed range from 1.6–5.1 km/h. Work rates reaching 3,700 m² per hour are possible due to a powerful engine with up to 13.0 hp, traction drive and a 73 cm cutting width. The AS 73 4T B&S effortlessly cuts grass up to 150 cm high. Variable blade speed offers two options depending on the conditions: the fast blade speed achieves an even finer mulching result, while the slower blade speed’s increased torque is recommended for dense and high growth such as areas that are seldom mowed. The AS 73 4T B&S is thus suitable for virtually every application.

Operation is simple, convenient and safe

The AS 73 4T B&S works with operating levers that activate the parking brake, the traction drive, the limited slip differential and the blade clutch. Absolute safety for slope mowing is achieved by an automatic parking brake and limited slip differential which remains permanently locked while the machine is in drive. When the drive lever is released, the parking brake automatically engages and the AS 73 4T B&S stops, whether on a slope or level ground. For convenient operation the guide bar is equipped with a V-handlebar which can be adjusted laterally and for height without tools. Cutting height can be adjusted from 50–100 mm while low-pressure tyres with field studs ensure optimal propulsion on both slopes and level ground.

Product advantages

Performs on slopesExtra fuel and oil pump with oil pressure switch optimize performance on slopes.
Perfect mowing and mulchingThe AS cross-blade system cuts and shreds grass simultaneously.
Variable speedThe AS 73 offers two blade speeds for optimal performance in any kind of growth.
Automatic parking brakeWhen the drive lever is released the machine stops automatically, whether on a slope or level ground.
Switchable limited slip differentialPermanently locked limited slip differential opens by pressing the differential lock lever.
Engine protectionSeparate engine and blade shaft protects engine.
Simple operating conceptOperation of parking brake, blade engagement, limited slip differential, drive function, speed adaptation, all with just three levers.
Drive wheelsInflatable tyres with field studs for excellent traction on slopes.

Product details

Height adjustment

Central, variable height adjustment from 50–100 mm.

Manual transmission

5-speed manual transmission with limited slip differential and reverse gear provide optimal propulsion, even on a wet grass.

Closed mower deck with rear discharge

Grass and growth are finely cut and mulched in the closed mowing deck with rear discharge. This system also enables work close to edges.

Adjustable operating bar

Guide bar can be adjusted laterally and in height to adapt to the size of each operator.

Technical Data

cutting width 73 cm
maximum grass height 150 cm
engine manufacturer B&S
engine designation Series3 INTEK
displacement 344 cm³
maximum power 9,7/13,0 kW (hp)
rated power 7,6/10,3 kW (hp)
rated speed 3300 rpm
blade clutch
side discharge / rear discharge /
closed mowing deck
mono-blade / cross-blade / Y-flails / /
cutting height 50 - 100 mm
drive, mechanical/hydrostatic /
number of gears 5
reverse gear
max. speed 5,1 km/h
limited-slip differential
automatic parking brake
steering brake
tank capacity 5 l
dimension L/W/H 224x79x99 cm
weight 135 kg


Operating hour meter

Documentation of work hours.

Twin tyres AS 65, AS 73, AS 84, AS 701 SM

Improved traction on slopes.

Electric start

Electric start provides easy and convenient starting of the machine.


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.

Road maintenance

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

Commercial landscaping

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

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.

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.


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.