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Gravely 812 vs Gravely 8123
Verdict: Gravely 812 vs Gravely 8123
The Gravely 812 and the Gravely 8123 are both lawn tractors — here is how they stack up on the figures that matter. Both are rated at the same 12 hp. Gravely 8123 is the newer design (1979 vs 1973). 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
12 hp
12 hp
Confidence
40%
40%
Guide price
—
—
Overview
Manufacturer
GravelyReference
GravelyReference
air-cooled horizontal-shaftReference
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
Engine
Fuel tank
20.1 LReference
20.1 LReference
Displacement
29.07 ciReference
29.07 ciReference
Bore/Stroke
83 x 86 mmReference
86 x 83 mmReference
Power
8.9 kWReference
—
Rated RPM
3600Reference
—
Starter
electricReference
electricReference
Starter volts
12Reference
12Reference
Sparkplug gap
0.635 mmReference
—
Intake valve clearance
0.229 mmReference
—
Exhaust valve clearance
0.457 mmReference
—
Oil capacity
5.7 LReference
5.7 LReference
Power (gross)
—
8.9 kWReference
Transmission
Type
shaft-driven gearReference
gearReference
Gears
8 forward and 4 reverseReference
8 forward and 4 reverseReference
Oil type
SAE30Reference
10W-40 SCReference
Dimensions
Weight
408 kgReference
408 kgReference
Front tire
16x6.50-8Reference
16x6.50-8Reference
Rear tire
23x8.50-12Reference
23x8.50-12Reference
Lawn/turf front
16x6.50-8Reference
16x6.50-8Reference
Lawn/turf rear
23x8.50-12Reference
23x8.50-12Reference
Length
191 cmReference
191 cmReference
Width
92 cmReference
92 cmReference
Height
109 cmReference
—
Shipping weight
408 kgReference
408 kgReference
Height (steering wheel)
—
109 cmReference
Gravely 812 attachments
812 Serial Numbers
Location:
In front of, and below, air cleaner.Reference
—
Electrical
Ground
negativeReference
negativeReference
Battery volts
12Reference
12Reference
Battery AH
43Reference
—
Battery Group
22FReference
—
Attachment overview
Variants
8122
—
manual liftReference
8123
—
hydraulic liftReference
Gravely 8123 attachments
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.