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Gravely 812 vs Oliver 125
Verdict: Gravely 812 vs Oliver 125
The Gravely 812 and the Oliver 125 are both lawn tractors — here is how they stack up on the figures that matter. Both are rated at the same 12 hp. Gravely 812 is the lighter machine (408 kg vs 750 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Gravely 812 holds more fuel (20.1 L vs 7.6 L) for longer stints between fills. Gravely 812 is the newer design (1973 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
Oliver
62
Fit score
Best match
Clear
Rated power
12 hp
12 hp
Confidence
40%
40%
Guide price
—
—
Overview
Manufacturer
GravelyReference
JacobsenReference
air-cooled horizontal-shaftReference
air-cooled horizontal-shaftReference
Distributor
—
OliverReference
Original price
—
$1480 (1972 hydro)Reference
Engine
Fuel tank
20.1 LReference
7.6 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
3600Reference
Starter
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
2.0 LReference
Power (gross)
—
8.9 kWReference
Air cleaner
—
dryReference
Transmission
Type
shaft-driven gearReference
belt-driven gearReference
Gears
8 forward and 4 reverseReference
infinite forward and reverseReference
Oil type
SAE30Reference
—
Gear Weight
—
340 kgReference
Transmission
—
shaft-driven hydrostaticReference
Dimensions
Weight
408 kgReference
750 to 770 poundsReference
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
182 cmReference
Width
92 cmReference
96 cmReference
Height
109 cmReference
—
Shipping weight
408 kgReference
—
Wheelbase
—
121 cmReference
Height (steering wheel)
—
105 cmReference
Height (hood)
—
92 cmReference
Hydro Weight
—
349 kgReference
Clearance (front axle)
—
23 cmReference
Clearance (rear axle)
—
20 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
125G
—
gear driveReference
125H
—
hydrostaticReference
GT-12
—
similar Jacobsen modelReference
PTO & Hydraulics
Front PTO
—
independentReference
Clutch
—
idler pulleyReference
Front PTO Type
—
pulleyReference
Oliver 125 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.