The Gravely 8183 is a lawn tractor with a rated power output of 18 hp, a typical figure for its class. It was manufactured during the 1979 to 1980 production period. It features a 2-cylinder petrol air-cooled engine, paired with two-wheel drive and an 8-speed gearbox. Its listed operating weight is 399 kg, making it suitable for operations covering up to 200 acres.
Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.
Rated power
18 hp
Weight
399 kg
Catalogue coverage
Variants represented
2
Richest spec table
43 rows
Recorded power
18 hp
Recorded weight
399 kg
Transmissions
8-speed gear
Production years
1979-1980
Verified variants
0
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Overview
ManufacturerGravelyReference
Garden tractorReference
Two-wheel driveReference
Manual steeringReference
Open operator station.Reference
Engine
18HP Onan 781cc 2-cyl gasolineReference
Fuel tank20.1 LReference
Onan B48MReference
gasolineReference
2-cylinderReference
air-cooled horizontal-shaft opposed-twinReference
Displacement47.7 ciReference
Bore/Stroke83 x 73 mmReference
Power (gross)13.4 kWReference
StarterelectricReference
Starter volts12Reference
Oil capacity1.9 LReference
Image courtesy of Jacob NewkirkReference
Transmission
8-speed gearReference
TypegearReference
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
Dimensions
Weight399 kgReference
Front tire16x6.50-8Reference
Rear tire23x8.50-12Reference
Lawn/turf front16x6.50-8Reference
Lawn/turf rear23x8.50-12Reference
Length207 cmReference
Width106 cmReference
Height (steering wheel)109 cmReference
Shipping weight399 kgReference
Gravely 8183 attachments
40" front-mount mower deckReference
50" mid-mount mower deckReference
snowblowerReference
bladeReference
Electrical
GroundnegativeReference
Battery volts12Reference
Attachment overview
40" front-mount mower deckReference
50" mid-mount mower deckReference
SnowblowerReference
BladeReference
Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.
