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Gravely 817 vs Gravely 8171
Verdict: Gravely 817 vs Gravely 8171
The Gravely 817 and the Gravely 8171 are both lawn tractors — here is how they stack up on the figures that matter. Both are rated at the same 17 hp. Gravely 8171 is the lighter machine (424 kg vs 435 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Gravely 8171 is the newer design (1978 vs 1977). 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
17 hp
17 hp
Confidence
40%
40%
Guide price
—
—
Overview
Manufacturer
GravelyReference
GravelyReference
air-cooled horizontal-shaft opposed-twinReference
Four gears (1-4) in two ranges (low/high) with directional control lever (forward/reverse). Reverse speeds are the same in high or low range.Reference
Engine
Fuel tank
20.1 LReference
—
Displacement
49.8 ciReference
49.8 ciReference
Bore/Stroke
76 x 83 mmReference
76 x 83 mmReference
Power (gross)
12.3 kWReference
12.3 kWReference
Rated RPM
3600Reference
—
Starter
electricReference
electricReference
Starter volts
12Reference
12Reference
Oil capacity
5.7 LReference
1.9 LReference
Transmission
Gears
8 forward and 4 reverseReference
8 forward and 4 reverseReference
Dimensions
Weight
114 kgReference
424 kgReference
Length
207 cmReference
191 cmReference
Width
106 cmReference
106 cmReference
Height
109 cmReference
109 cmReference
Shipping weight
435 kgReference
424 kgReference
Wheelbase
—
121 cmReference
Front tire
—
16x7.50-8Reference
Rear tire
—
23x10.50-12Reference
Lawn/turf front
—
16x7.50-8Reference
Lawn/turf rear
—
23x10.50-12Reference
Ground clearance
—
17 cmReference
Gravely 817 attachments
Electrical
Ground
negativeReference
negativeReference
Battery volts
12Reference
12Reference
Charging system
—
flywheel alternatorReference
Charging amps
—
15Reference
Battery AH
—
42Reference
Attachment overview
50" Mower deck
Type
shaft-driven gearReference
shaft-driven gearReference
Cutting width
127 cmReference
—
Cut height
3 to 10 cmReference
—
Capacities
Fuel
—
20.1 LReference
PTO & Hydraulics
Hydraulic system
—
1.4 LReference
Capacity
—
1.4 LReference
Pressure
—
82.7 barReference
Pump flow
—
6.4 lpmReference
Mid PTO
—
independentReference
Clutch
—
mechanicalReference
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.