The Yanmar YM122 is a lawn tractor model with a rated output of 12 hp, which positions it in the middle of its class in terms of power. It was manufactured from 1983 to 1987. The 1-cylinder diesel liquid-cooled engine drives the tractor through a 6-speed gearbox with two-wheel drive, and it has a listed weight of 376 kg. This model is suited to handling areas of approximately 200 acres.
Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.
Rated power
12 hp
Weight
376 kg
Catalogue coverage
Variants represented
2
Richest spec table
61 rows
Recorded power
12 hp
Recorded weight
376 kg
Transmissions
6-speed gear
Production years
1983-1987
Verified variants
0
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Overview
ManufacturerYanmarReference
Garden tractorReference
Original price was $5,000 in 1989Reference
Two-wheel driveReference
Manual steeringReference
Mechanical drum brakesReference
Open operator station.Reference
Engine
12HP Yanmar 534cc 1-cyl dieselReference
Fuel tank9.8 LReference
Yanmar MA10-NReference
dieselReference
1-cylinderReference
liquid-cooledReference
Displacement32.64 ciReference
Bore/Stroke88 x 88 mmReference
Power8.9 kWReference
Air cleanerdryReference
Rated RPM2600Reference
Idle RPM1400-2825Reference
Starter volts12Reference
Coolant capacity3.1 LReference
Oil capacity3.2 LReference
Oil change100 hReference
Transmission
6-speed gearReference
TypegearReference
Gears6 forward and 3 reverseReference
Oil capacity6.3 LReference
Oil typeJDM303Reference
Oil change300 hReference
Two gears, plus reverse, in three ranges.Reference
PTO & Hydraulics
Typeopen centerReference
Pressure58.8 barReference
Pump flow7.6 lpmReference
Rear Type0Reference
Rear lift (at ends)170 kgReference
Rear lift (at 24"/610mm)125 kgReference
Rear PTOtransmissionReference
Rear PTO Type2000Reference
Front PTOindependentReference
ClutchelectricReference
Dimensions
Wheelbase130 cmReference
Weight376 kgReference
Front tire16x6.50-8Reference
Rear tire23x10.50-12Reference
Lawn/turf front16x6.50-8Reference
Lawn/turf rear23x10.50-12Reference
Length191 cmReference
Width101 cmReference
Height (steering wheel)113 cmReference
Shipping weight376 kgReference
Ground clearance16 cmReference
Yanmar YM122 attachments
42" mid-mount mower deckReference
48" mid-mount mower deckReference
Electrical
GroundnegativeReference
Charging systemalternatorReference
Charging amps15Reference
Battery volts12Reference
Battery AH47Reference
Attachment overview
42" mid-mount mower deckReference
48" mid-mount mower deckReference
Speeds
With 23x10.50-12 rear tires.Reference
Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.
