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Lawn Tractor · 1980Unverified
Gravely 8199
Gravely 8199 — Model year 1980-19811981-1985 · 20 hp. Reference specifications; pending source verification.
The Gravely 8199 is a lawn tractor with a rated output of 20 hp, categorising it among the higher-powered machines in its class. Manufactured from 1980 to 1985, this model features a 2-cylinder petrol air-cooled engine driving a two-wheel drive system with an 8-speed gearbox. The listed weight of the Gravely 8199 is 424 kg, with an operating capacity of approximately 200 acres.
Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.
Rated power
20 hp
Weight
424 kg
Catalogue coverage
Variants represented
2
Richest spec table
43 rows
Recorded power
20 hp
Recorded weight
424 kg
Transmissions
8-speed gear
Production years
1980-1985
Verified variants
0
No linked source document is currently displayed; verify critical figures with the manufacturer or dealer.
Hover a source tag to verify
Overview
ManufacturerGravelyReference
Garden tractorReference
Two-wheel driveReference
Manual steeringReference
Open operator station.Reference
Engine
19.9HP Onan 781cc 2-cyl gasolineReference
Fuel tank20.1 LReference
Onan B48GReference
gasolineReference
2-cylinderReference
air-cooled horizontal-shaft opposed-twinReference
Displacement47.7 ciReference
Bore/Stroke83 x 73 mmReference
Power (gross)14.8 kWReference
Rated RPM3600Reference
Starter volts12Reference
Transmission
8-speed gearReference
Typeshaft-driven gearReference
Gears8 forward and 4 reverseReference
Oil capacity5.7 LReference
Oil type10W-40 SCReference
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
Typeopen centerReference
Pressure82.7 barReference
Pump flow6.4 lpmReference
Mid PTOindependentReference
ClutchmechanicalReference
Mid PTO Type1000Reference
Dimensions
Wheelbase132 cmReference
Weight424 kgReference
Front tire16x7.50-8Reference
Rear tire23x10.50-12Reference
Lawn/turf front16x7.50-8Reference
Lawn/turf rear23x10.50-12Reference
Length210 cmReference
Width109 cmReference
Height112 cmReference
Shipping weight424 kgReference
Ground clearance17 cmReference
Electrical
GroundnegativeReference
Battery volts12Reference
Battery AH42Reference
Battery GroupBCI 22FReference
Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.
