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Wheel Horse 612-Z vs Wheel Horse C-121
Verdict: Wheel Horse 612-Z vs Wheel Horse C-121
The Wheel Horse 612-Z and the Wheel Horse C-121 are both lawn tractors — here is how they stack up on the figures that matter. Both are rated at the same 12 hp. Wheel Horse 612-Z is the lighter machine (309 kg vs 600 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Wheel Horse 612-Z is the newer design (1990 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
Wheel Horse
62
Fit score
Best match
Clear
Wheel Horse
62
Fit score
Best match
Clear
Rated power
12 hp
12 hp
Confidence
40%
40%
Guide price
—
—
Overview
Manufacturer
Wheel Horse (a part of Toro)Reference
SundstrandReference
air-cooled vertical-shaftReference
Image courtesy of Arthur AndersenReference
Original price
—
$2,310 (1978 hydro )Reference
Engine
Fuel tank
11.4 LReference
11.4 LReference
Displacement
23.7 ciReference
29.07 ciReference
Bore/Stroke
84 x 70 mmReference
86 x 83 mmReference
Power
8.9 kWReference
—
Starter
electricReference
electricReference
Starter volts
12Reference
12Reference
Power (gross)
—
8.9 kWReference
Rated RPM
—
3400Reference
Oil capacity
—
5.2 LReference
Sparkplug gap
—
0.635 mmReference
Point gap
—
0.508 mmReference
Transmission
Transmission
Eaton 780Reference
Wheel Horse 103916Reference
Type
hydrostaticReference
belt-driven hydrostaticReference
Gears
infinite forward and reverseReference
infinite forward and reverseReference
Gear Weight
—
272 kgReference
PTO & Hydraulics
Mid PTO
independentReference
independentReference
Clutch
electricReference
manual dry discReference
Mid PTO Type
—
pulleyReference
Dimensions
Wheelbase
106 cmReference
115 cmReference
Weight
309 kgReference
600 to 630 poundsReference
Front tire
11x4.00-5Reference
16x6.50-8Reference
Rear tire
18x9.50-8Reference
23x8.50-12Reference
Lawn/turf front
11x4.00-5Reference
16x6.50-8Reference
Lawn/turf rear
18x9.50-8Reference
23x8.50-12Reference
Length
182 cmReference
165 cmReference
Width
101 cmReference
91 cmReference
Height
—
104 cmReference
Hydro Weight
—
285 kgReference
612-Z Serial Numbers
Location:
Serial number plate on the left side of the machine, behind the left drive wheel.Reference
Serial number plate below the dashboard. Tractor model codes shown.Reference
Electrical
Ground
negativeReference
negativeReference
Battery CCA
280Reference
—
Battery volts
12Reference
12Reference
Charging amps
—
15Reference
Attachment overview
C-121 Serial Numbers
1978
—
81-12KS01 (hydro)Reference
1979
—
81-12KS01 (hydro)Reference
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.