How To Restore 1971 Sears Suburban 12 Garden Tractor

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Sears Suburban 12 Technical Specifications

General Information

Tractor Model ...................... Sears Suburban-12 917.99420
Tractor Type ...................... Garden tractor
Manufacture Years ...................... 1966-1971
Fuel Type ...................... Gasoline
Attachments ...................... Mower Deck

Sears Suburban 12 Engine

Engine Model ...................... Tecumseh HH120
Engine Type ...................... 4-cycle air-cooled single cylinder gasoline
Number of Cylinders ...................... 1
Displacement, cu.in (cc) ...................... 27.7 (453)
Engine Bore, in (mm) ...................... 3.50 (89.0)
Engine Stroke, in (mm) ...................... 2.88 (73.0)
Maximum Engine Power, hp (kW) ...................... 12.0 (8.9)
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)
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)

Electrical System

Electrical System Rating, Volts ...................... 12
Charging System ...................... Electric starter
Number of Batteries ...................... 1
Battery Voltage, Volts ...................... 12
Electric Ground ...................... Negative

Sears Suburban 12 Transmission

Transmission Type ...................... Belt-driven gear
Gearbox Type ...................... 6F/2R
Number of Forward Gears ...................... 6
Number of Reverse Gears ...................... 2
Oil Capacity, qt (L) ...................... 5.0 (4.7)
Maximum Forward Speed, mph (kph) ...................... 5.9 (9.5)
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) ...................... 4.80x8
Rear Tire Size (Std) ...................... 7.50x12
Front Tire Size (Opt) ...................... 16x5.50-8
Rear Tire Size (Opt) ...................... 22.5x7.50-12

Dimensions and Weight

Wheelbase, in (mm) ...................... 43.5 (1110)
Length, in (mm) ...................... 65 (1650)
Height, in (mm) ...................... 39.5 (1000)
Overall Width, in (mm) ...................... 35 (885)
Weight, lb (kg) ...................... 581 (263)

Sears Suburban 12 Attachments

42" Mower Deck

Mower Deck Type ...................... Mid-mount
Number of Blades ...................... 3
Cutting Width, in (mm) ...................... 42 (1060)
Cutting Height, in (mm) ...................... 1.5-4.0 (38-102)
Deck Drive ...................... Belt
Lift System ...................... Mechanical

48" Mower Deck

Mower Deck Type ...................... Mid-mount
Number of Blades ...................... 3
Cutting Width, in (mm) ...................... 48 (1215)
Cutting Height, in (mm) ...................... 1.5-4.0 (38-102)
Deck Drive ...................... Belt
Lift System ...................... Mechanical

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