Simplicity lawn tractors

Simplicity Sovereign 3112H

The Simplicity Sovereign 3112H is a 1969 garden tractor from the Sovereign Series by Simplicity. It features a 12 hp Briggs & Stratton 494cc 1-cylinder gasoline engine with an air-cooled horizontal shaft. The tractor uses a hydrostatic transmission with infinite forward and reverse gears. It has a wheelbase of 48 inches, length of 72 inches, width of 34.5 inches, and height of 37.75 inches. Tires are lawn/turf type with sizes 18x6.50-8 front and 23x8.50-12 rear. Electrical system is 12 volts with negative ground. The tractor includes a mid PTO that is independent with a mechanical idler pulley clutch. Attachments include 42" and 48" mid-mount mower decks, both 3-blade. Variants include gear and hydro models with manual or power lift options.
Power-
Founded-
Model3112H

Technical Specifications

Detailed specifications and technical data for Simplicity Sovereign 3112H

Power
Power12.0 hp
Tires
Lawn/turf rear23x8.50-12
Lawn/turf front18x6.50-8
Engine
Typegasoline
ModelBriggs & Stratton 300421
Power12 hp (8.9 kW)
Coolingair-cooled horizontal-shaft
Starterelectric
Cylinders1-cylinder
Bore/Stroke3.4375x3.25 inches (87 x 83 mm)
Displacement494 cc (30.16 ci)
Starter volts12
Variants
990494gear with manual lift
990495gear with power lift
990499hydro with manual lift
990500hydro with power lift
Dimensions
Width34.5 inches (87 cm)
Height37.75 inches (95 cm)
Length72 inches (182 cm)
Wheelbase48 inches (121 cm)
Electrical
Groundnegative
Battery volts12
Production
TypeGarden tractor
Year1969
SeriesSovereign Series
ManufacturerSimplicity
Attachments
42" mid-mount mower deck42 inches (106 cm), 3-blade
48" mid-mount mower deck48 inches (121 cm), 3-blade
Transmission
Typehydrostatic
Gearsinfinite forward and reverse
Power Take-off (PTO)
Clutchmechanial idler pulley
Mid PTOindependent