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Gravely 18-G vs Gravely 818
Verdict: Gravely 18-G vs Gravely 818
The Gravely 18-G and the Gravely 818 are both lawn tractors — here is how they stack up on the figures that matter. Both are rated at the same 18 hp. Gravely 18-G is the lighter machine (391 kg vs 408 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Gravely 18-G is the newer design (1988 vs 1978). Use the full side-by-side spec tables below to weigh the details against your own operation, and confirm with a dealer demo.
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Fit & specs
Gravely
62
Fit score
Best match
Clear
Gravely
62
Fit score
Best match
Clear
Rated power
18 hp
18 hp
Confidence
40%
40%
Guide price
—
—
Overview
Manufacturer
GravelyReference
GravelyReference
air-cooledReference
air-cooled horizontal-shaft opposed-twinReference
Engine
Fuel tank
20.1 LReference
20.1 LReference
Displacement
42.18 ciReference
47.7 ciReference
Bore/Stroke
79 x 70 mmReference
83 x 73 mmReference
Power (gross)
13.4 kWReference
13.4 kWReference
Rated RPM
3300Reference
—
Starter
electricReference
electricReference
Starter volts
12Reference
12Reference
Oil capacity
5.7 LReference
5.7 LReference
Transmission
Type
shaft-driven gearReference
3-blade with hydraulic liftReference
Gears
8 forward and 4 reverseReference
8 forward and 4 reverseReference
Oil type
SC10W-30Reference
—
Dimensions
Wheelbase
132 cmReference
—
Weight
391 kgReference
408 kgReference
Front tire
16x7.50-8Reference
16x6.50-8Reference
Rear tire
23x10.50-12Reference
23x8.50-12Reference
Lawn/turf front
16x7.50-8Reference
16x6.50-8Reference
Lawn/turf rear
23x10.50-12Reference
23x8.50-12Reference
Length
208 cmReference
207 cmReference
Width
109 cmReference
106 cmReference
Height
129 cmReference
109 cmReference
Shipping weight
—
408 kgReference
Gravely 18-G attachments
Electrical
Ground
negativeReference
negativeReference
Charging amps
15Reference
—
Battery volts
12Reference
12Reference
Battery AH
42Reference
43Reference
Battery Group
22FReference
22FReference
Attachment overview
Gravely 818 attachments
50" Mower deck
Cutting width
—
127 cmReference
Fit score weighs budget, operation size, crop match and data confidence against the details above. It’s guidance, not advice — always confirm with a dealer demo.