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Gravely 816 vs Gravely 8171
Verdict: Gravely 816 vs Gravely 8171
The Gravely 816 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 1972). 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
The B43M was used on the Gravely 816 for the final production year, in 1978.Reference
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
43.7 ciReference
49.8 ciReference
Bore/Stroke
83 x 67 mmReference
76 x 83 mmReference
Power
11.9 kWReference
—
Rated RPM
3600Reference
—
Starter
electricReference
electricReference
Starter volts
12Reference
12Reference
Sparkplug gap
0.635 mmReference
—
Intake valve clearance
0.279 mmReference
—
Exhaust valve clearance
0.279 mmReference
—
Oil capacity
5.7 LReference
1.9 LReference
Power (gross)
—
12.3 kWReference
Transmission
Type
shaft-driven gearReference
shaft-driven gearReference
Gears
8 forward and 4 reverseReference
8 forward and 4 reverseReference
Oil type
SAE30Reference
—
Dimensions
Weight
435 kgReference
424 kgReference
Front tire
16x6.50-8Reference
16x7.50-8Reference
Rear tire
23x8.50-12Reference
23x10.50-12Reference
Lawn/turf front
16x6.50-8Reference
16x7.50-8Reference
Lawn/turf rear
23x8.50-12Reference
23x10.50-12Reference
Length
191 cmReference
191 cmReference
Width
106 cmReference
106 cmReference
Height
109 cmReference
109 cmReference
Shipping weight
435 kgReference
424 kgReference
Wheelbase
—
121 cmReference
Ground clearance
—
17 cmReference
Gravely 816 attachments
816 Serial Numbers
Location:
In front of, and below, air cleaner.Reference
—
Electrical
Ground
negativeReference
negativeReference
Battery volts
12Reference
12Reference
Battery AH
43Reference
42Reference
Battery Group
22FReference
—
Charging system
—
flywheel alternatorReference
Charging amps
—
15Reference
Attachment overview
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.