Sears lawn tractors

Sears ST/10 Deluxe 917.25920

The Sears ST/10 Deluxe 917.25920 is a 1976 garden tractor built by Roper and distributed by Sears. It features a 10 hp Tecumseh HH100 388cc 1-cylinder air-cooled gasoline engine, a Peerless 6-speed belt-driven gear transmission with 6 forward and 2 reverse gears, and two-wheel manual steering. The tractor has an open operator station and weighs 556 lbs (252 kg). It rides on 16x5.50x8 front and 23x8.50x12 rear lawn/turf tires. Attachments include a 38" mid-mount mower deck, snowblower, and blade. Early catalogs list this model as ST/10 Deluxe 917.25920, with later advertising showing the ST/10X 917.25921 variant.

Power-

Founded-

ModelST/10 Deluxe

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Technical Specifications

Detailed specifications and technical data for Sears ST/10 Deluxe 917.25920

Tires

Rear tire	23x8.50x12
Front tire	16x5.50x8

Engine

Type	gasoline
Model	Tecumseh HH100
Cooling	air-cooled horizontal-shaft
Starter	electric
Cylinders	1-cylinder
Fuel tank	1.75 gal (6.6 L)
Bore/Stroke	3.31x2.75 inches (84 x 70 mm)
Displacement	388 cc (23.7 ci)
Power (gross)	10 hp (7.5 kW)
Starter volts	12

Variants

917.25920	ST/10 Deluxe
917.25921	ST/10X

Dimensions

Width	34 inches (86 cm)
Length	63 inches (160 cm)
Shipping weight	556 lbs (252 kg)

Electrical

Ground	negative
Battery volts	12

Mechanical

Drive	Two-wheel drive
Steering	Manual steering
Operator station	Open operator station

Production

Type	Garden tractor
Notes	Early catalogs show this model as the ST/10 Deluxe 917.25920. Later advertising shows the ST/10X 917.25921.
Distributor	Sears
Manufacturer	Roper
Original price	$1,139 in 1976

Attachments

Note	Garden tractors are capable of using tillers, plows, or other ground-engaging attachments.
Overview	38" mid-mount mower deck, Snowblower, Blade
42" Blade	Craftsman 26448, front-mount, 42 inches width (106 cm), 17.5 inches height (44 cm), 108 lbs (48 kg), manual-lift, manual-angle
38" Mower deck	mid-mount Sears, 2-blade with manual lift, Cutting width 38 inches (96 cm), Weight 98 lbs (44 kg)
35" Snow blower	Craftsman 25066, 35 inches width (88 cm), single-stage, front-mount, manual-lift, 182 lbs (82 kg)

Transmission