General Information
Tractor Model …………………. Sears ST-16 917.25940
Tractor Type …………………. Garden tractor
Manufacture Years …………………. 1973-1976
Fuel Type …………………. Gasoline
Attachments …………………. Mower Deck, Blade and Snowblower
Sears ST16 Engine
Engine Model …………………. Tecumseh OH160
Engine Type …………………. 4-cycle single-cylinder OVH air-cooled gasoline engine
Number of Cylinders …………………. 1
Displacement, cu.in (cc) …………………. 27.66 (453.4)
Cylinder Bore, in (mm) …………………. 3.50 (88.9)
Piston Stroke, in (mm) …………………. 2.88 (73.0)
Rated Engine Power, hp (kW) …………………. 16.0 (11.9)
Rated Engine Speed, rpm …………………. 3600
Maximum Torque, Nm (ft-lbs) …………………. 33.9 (25.1)
Torque Speed, rpm …………………. 2800
Compression Ratio …………………. 8.7:1
Crankshaft …………………. Iron alloy
Cylinder …………………. Cast iron alloy
Fuel System Type …………………. Carburetor
Carburetor Type …………………. Float, adjustable jet
Governor Type …………………. Mechanical
Lubrication System …………………. Splash type
Air Cleaner …………………. Paper element
Cooling System …………………. Forced air
Ignition System …………………. Solid state magneto
Spark Plug Type …………………. Champion RL82C
Spark Plug Gap, in (mm) …………………. 0.030 (0.762)
Intake Valve Clearance, in (mm) …………………. 0.005-0.010 (0.13-0.25)
Exhaust Valve Clearance, in (mm) …………………. 0.005-0.010 (0.13-0.25)
Fuel Tank Capacity, gal (L) …………………. 1.8 (6.6)
Oil Capacity, qts (L) …………………. 1.65 (1.56)
Electrical System
Electrical System Rating, Volts …………………. 12
Charging System …………………. Alternator
Alternator Rating, Amps …………………. 20
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 ST16 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)
Wheels and Tires
Drive Wheels …………………. 2WD 4×2
Steering Configuration …………………. Front steer
Steering System …………………. Manual
Front Tire Size …………………. 16×5.50×8
Rear Tire Size …………………. 23×9.50×12
Dimensions and Weight
Wheelbase, in (mm) …………………. 43.5 (1100)
Length, in (mm) …………………. 66 (1670)
Height, in (mm) …………………. 40 (1010)
Overall Width, in (mm) …………………. 36.5 (925)
Weight, lb (kg) …………………. 670 (303)
Sears ST16 Attachments
42″ Mower Deck
Mower Deck Type …………………. Mid-mount
Number of Blades …………………. 3
Cutting Width, in (mm) …………………. 42 (1060)
Cutting Height, in (mm) …………………. 1.5-4.5 (38-114)
Deck Drive …………………. Belt
Lift System …………………. Mechanical
Weight, lb (kg) …………………. 169 (76)
48″ Mower Deck
Mower Deck Type …………………. Mid-mount
Number of Blades …………………. 3
Cutting Width, in (mm) …………………. 48 (1215)
Cutting Height, in (mm) …………………. 1.5-4.5 (38-114)
Deck Drive …………………. Belt
Lift System …………………. Mechanical
Weight, lb (kg) …………………. 182 (82)
42″ Snow Blower
Snowblower Type …………………. Front-mount
Clearing Width, in (mm) …………………. 42 (1060)
Lift System …………………. Mechanical
Front Blade
Blade Type …………………. Front-mount
Width, in (mm) …………………. 46 (1160)
Height, in (mm) …………………. 17 (430)
Lift System …………………. Mechanical
Angle …………………. Manual