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Sears ST 10 Specifications

General Information

Tractor Model ...................... Sears ST10 917.2572/502.25910
Tractor Type ...................... Garden tractor
Manufacture Years ...................... 1973-1976
Fuel Type ...................... Gasoline
Attachments ...................... Mower Deck, Blade and Snowblower

Sears ST 10 Engine

Tecumseh Engine

Engine Model ...................... Tecumseh HH100
Engine Type ...................... 4-cycle single cylinder horizontal-shaft air-cooled gasoline
Number of Cylinders ...................... 1
Displacement, cu.in (cc) ...................... 23.7 (388)
Engine Bore, in (mm) ...................... 3.31 (84.0)
Engine Stroke, in (mm) ...................... 2.75 (70.0)
Maximum Engine Power, hp (kW) ...................... 10.0 (7.5)
Rated Engine Speed, rpm ...................... 3600
Idle Speed, rpm ...................... 1600
Fuel System ...................... Carburetor
Carburetor Type ...................... Float-feed
Fuel Pump ...................... Impulse type
Governor ...................... Centrifugal flyball type
Lubrication System ...................... Splash type
Air Cleaner ...................... Dry element
Ignition System ...................... Flywheel magneto
Spark Plug Gap, in (mm) ...................... 0.028-0.033 (0.711-0.838)
Magneto Air Gap, in (mm) ...................... 0.006-0.010 (0.152-0.254)
Intake Valve Clearance, in (mm) ...................... 0.010 (0.25)
Exhaust Valve Clearance, in (mm) ...................... 0.020 (0.51)
Fuel Tank Capacity, gal (L) ...................... 1.8 (6.5)
Oil Capacity, qts (L) ...................... 1.6 (1.5)

Briggs Engine

Engine Model ...................... Briggs and Stratton 251707
Engine Type ...................... 4-Cycle, single cylinder L-head, air-cooled gasoline
Number of Cylinders ...................... 1
Displacement, cu.in (L) ...................... 24.36 (0.399)
Engine Bore, in (mm) ...................... 3.44 (87.0)
Engine Stroke, in (mm) ...................... 2.63 (67.0)
Maximum Horse Power, hp (kW) ...................... 10.0 (7.5)
Rated Engine Speed, rpm ...................... 3600
Idle Engine Speed, rpm ...................... 1800-3400
Maximum Torque, Nm (ft-lbs) ...................... 22.7 (16.8)
Torque Speed, rpm ...................... 2400
Fuel System ...................... Carburetor
Governor ...................... Mechanical (Flyweight)
Air Cleaner ...................... Foam
Ignition System ...................... Battery
Spark Plug Type ...................... Champion CJ-8, Autolite A7N or AC CS-45
Spark Plug Gap, in (mm) ...................... 0.030 (0.76)
Breaker Point Gap, in (mm) ...................... 0.020 (0.50)
Valve Clearance (Intake), in (mm) ...................... 0.005-0.007 (0.13-0.18)
Valve Clearance (Exhaust), in (mm) ...................... 0.009-0.011 (0.23-0.28)
Fuel Tank Capacity, gal (L) ...................... 2.0 (7.6)
Oil Capacity, qt (L) ...................... 1.5 (1.4)

Electrical System

Electrical System Rating, Volts ...................... 12
Starter Type ...................... Electric
Number of Batteries ...................... 1
Electric Ground ...................... Negative

Power Take Off

PTO Operational Type ...................... Independent
PTO Clutch ...................... Mechanical
PTO Speed, rpm ...................... 3000

Sears ST 10 Transmission

Transmission Type ...................... Belt-driven gear
Gearbox Type ...................... 6F/2R
Number of Forward Gears ...................... 6
Number of Reverse Gears ...................... 2
Maximum Forward Speed, mph (kph) ...................... 6.5 (10.5)
Maximum Reverse Speed, mph (kph) ...................... 2.5 (4.0)

Transmission Model ...................... Peerless
Transmission Type ...................... Belt-driven gear
Gearbox Type ...................... 4F/1R
Number of Forward Gears ...................... 4
Number of Reverse Gears ...................... 1
Maximum Forward Speed, mph (kph) ...................... 6.0 (9.6)
Maximum Reverse Speed, mph (kph) ...................... 2.3 (3.7)

Wheels and Tires

Drive Wheels ...................... 2WD 4x2
Steering Configuration ...................... Front steer
Steering System ...................... Manual
Front Tire Size (Std) ...................... 16x5.50x8
Rear Tire Size (Std) ...................... 22.5x7.50x12
Front Tire Size (Opt) ...................... 16x6.00x8
Rear Tire Size (Opt) ...................... 23x8.50x12

Dimensions and Weight

Wheelbase, in (mm) ...................... 43.5 (1100)
Length, in (mm) ...................... 68.5 (1730)
Height, in (mm) ...................... 37 (930)
Overall Width, in (mm) ...................... 36 (900)
Weight, lb (kg) ...................... 560 (255)

Sears ST 10 Attachments

38" Mower Deck

Mower Deck Type ...................... Mid-mount, right-discharge
Number of Blades ...................... 2
Cutting Width, in (mm) ...................... 38 (960)
Overall Width, in (mm) ...................... 54 (1370)
Cutting Height, in (mm) ...................... 1.5-3.5 (38-89)
Deck Drive ...................... Belt
Lift System ...................... Mechanical

35" Snow Blower

Snowblower Type ...................... Front-mount
Clearing Width, in (mm) ...................... 35 (880)
Lift System ...................... Mechanical

Front Blade

Blade Type ...................... Front-mount
Width, in (mm) ...................... 42 (1060)
Height, in (mm) ...................... 17 (430)
Lift System ...................... Mechanical
Angle ...................... Manual