Sears lawn tractors

Sears ST/12 917.2573

The Sears ST/12 is a garden tractor produced from 1973 to 1976 by Roper and distributed by Sears. It features a 12 hp Tecumseh HH120 gasoline engine with a 453 cc displacement and an air-cooled horizontal-shaft design. The tractor has a 6-speed belt-driven gear transmission with 6 forward and 2 reverse gears. It is a two-wheel drive with manual steering and an open operator station. The tractor includes a mid PTO with independent manual clutch and an optional Sears 3-point hitch. Dimensions include a 43.4 inch wheelbase, 68.5 inch length, and a shipping weight of 641 lbs. Attachments available include 42" and 48" mid-mount mower decks, a 46" front-mount blade, and a 39" front-mount snow blower.

Power-

Founded-

ModelST/12

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Technical Specifications

Detailed specifications and technical data for Sears ST/12 917.2573

Engine

Type	gasoline
Model	Tecumseh HH120
Power	12 hp (8.9 kW)
Cooling	air-cooled horizontal-shaft
Starter	electric
Cylinders	1-cylinder
Bore/Stroke	3.50x2.875 inches (89 x 73 mm)
Displacement	453 cc (27.66 ci)
Starter volts	12

Features

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

Dimensions

Width	36.5 inches (92 cm)
Length	68.5 inches (173 cm)
Rear tire	22.5x7.50
Wheelbase	43.4 inches (110 cm)
Front tire	16x5.50
Shipping weight	641 lbs (290 kg)
Height (steering wheel)	44 inches (111 cm)

Electrical

Ground	negative
Battery volts	12

Production

Type	Garden tractor
Distributor	Sears
Manufacturer	Roper
Original price	$970 in 1974
Years produced	1973 - 1976

Attachments

46" Blade	Sears 917.253330, front-mount, 46 inches width (116 cm), 17.5 inches height (44 cm), 117 lbs (53 kg), manual-lift, manual-angle
39" Snow blower	Sears 917.253350, 39 inches width (99 cm), single-stage, front-mount, manual-lift, 177 lbs (80 kg)
42" mid-mount mower deck	42 inches, 3-blade, manual lift, right-discharge, 169 lbs (76 kg)
48" mid-mount mower deck	48 inches, 3-blade, manual lift, right-discharge, 182 lbs (82 kg)

Transmission