The Gravely 818 is a lawn tractor with a rated power output of 18 hp, a mid-range figure for its class. It features a 2-cylinder petrol air-cooled engine and is equipped with a two-wheel drive system paired with an 8-speed gearbox. The operating weight of the Gravely 818 is listed at 408 kg. It is suitable for operations spanning 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
408 kg
Catalogue coverage
Variants represented
2
Richest spec table
42 rows
Recorded power
18 hp
Recorded weight
408 kg
Transmissions
8-speed
Production years
1978-1978
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 capacity2.1 LReference
Transmission
8-speedReference
Gears8 forward and 4 reverseReference
Oil capacity5.7 LReference
Dimensions
Weight408 kgReference
Front tire16x6.50-8Reference
Rear tire23x8.50-12Reference
Lawn/turf front16x6.50-8Reference
Lawn/turf rear23x8.50-12Reference
Length207 cmReference
Width106 cmReference
Height109 cmReference
Shipping weight408 kgReference
Gravely 818 attachments
50" mid-mount mower deckReference
snowblowerReference
bladeReference
Electrical
GroundnegativeReference
Battery volts12Reference
Battery AH43Reference
Battery Group22FReference
Attachment overview
50" mid-mount mower deckReference
SnowblowerReference
BladeReference
50" Mower deck
Typemid-mount Gravely 21297Reference
Type3-blade with hydraulic liftReference
Cutting width127 cmReference
Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.
