The Gravely 8128 lawn tractor model is rated at 12 hp, placing it in the middle of its class in terms of power output. Manufactured in 1980, this model is equipped with a 1-cylinder petrol air-cooled engine, which drives the two-wheel drive system via an 8-speed gearbox. The listed weight of the Gravely 8128 is 403 kg, and it is designed for use on areas of approximately up to 200 acres.
Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.
Rated power
12 hp
Weight
403 kg
Catalogue coverage
Variants represented
2
Richest spec table
40 rows
Recorded power
12 hp
Recorded weight
403 kg
Transmissions
8-speed gear
Production years
1980-1980
Verified variants
0
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Overview
ManufacturerGravelyReference
Garden tractorReference
Two-wheel driveReference
Manual steeringReference
Mechanical band brakesReference
Open operator station.Reference
Variants
8128mechanical liftReference
8129hydraulic liftReference
Engine
12HP Kohler 476cc 1-cyl gasolineReference
Fuel tank20.1 LReference
Kohler K301Reference
gasolineReference
1-cylinderReference
air-cooled horizontal-shaftReference
Displacement29.07 ciReference
Bore/Stroke86 x 83 mmReference
Power8.9 kWReference
StarterelectricReference
Starter volts12Reference
Transmission
8-speed gearReference
Typeshaft-driven gearReference
Gears8 forward and 4 reverseReference
Four gears (1-4) in two ranges (low-high) with forward/reverse clutches. The directional clutch must be in neutral to shift gears or ranges.Reference
PTO & Hydraulics
Mid PTOindependentReference
ClutchmechanicalReference
Mid PTO Type1000Reference
Dimensions
Wheelbase132 cmReference
Weight403 kgReference
Front tire16x6.50-8Reference
Rear tire23x8.50-12Reference
Lawn/turf front16x6.50-8Reference
Lawn/turf rear23x8.50-12Reference
Length201 cmReference
Width92 cmReference
Height109 cmReference
Shipping weight403 kgReference
Ground clearance17 cmReference
Electrical
GroundnegativeReference
Battery volts12Reference
Battery AH42Reference
Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.
