The Wheel Horse 620-Z is a lawn tractor with a rating of approximately 20 hp, positioning it at the higher end of its class in terms of power. Manufactured from 1991 to 1992, this model features a 2-cylinder petrol air-cooled engine and two-wheel drive with a hydrostatic transmission. The unit has an operating weight of 326 kg and is suitable for operations covering up to 200 acres.
Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.
Rated power
20 hp
Weight
326 kg
Catalogue coverage
Variants represented
2
Richest spec table
42 rows
Recorded power
20 hp
Recorded weight
326 kg
Transmissions
hydrostatic
Production years
1991-1992
Verified variants
0
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Overview
ManufacturerWheel Horse (a part of Toro)Reference
Zero-turn mowerReference
Two-wheel driveReference
Power steeringReference
Open operator station.Reference
Engine
20HP Onan 786cc 2-cyl gasolineReference
Fuel tank11.4 LReference
Onan P220VReference
gasolineReference
2-cylinderReference
air-cooled vertical-shaftReference
Displacement48 ciReference
Bore/Stroke83 x 73 mmReference
Power14.9 kWReference
StarterelectricReference
Starter volts12Reference
Transmission
hydrostaticReference
TransmissionEaton 781Reference
TypehydrostaticReference
Gearsinfinite forward and reverseReference
PTO & Hydraulics
Mid PTOindependentReference
ClutchelectricReference
Dimensions
Wheelbase106 cmReference
Weight326 kgReference
Front tire11x4.00-5Reference
Rear tire18x9.50-8Reference
38" mid-mount mower deckReference
42" mid-mount mower deckReference
52" mid-mount mower deckReference
bladeReference
Lawn/turf front11x4.00-5Reference
Lawn/turf rear18x9.50-8Reference
Length182 cmReference
Width101 cmReference
620-Z Serial Numbers
Location:Serial number plate on the left side of the machine, behind the left drive wheel.Reference
Electrical
GroundnegativeReference
Battery CCA280Reference
Battery volts12Reference
Attachment overview
38" mid-mount mower deckReference
42" mid-mount mower deckReference
52" mid-mount mower deckReference
BladeReference
Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.
