Lawn Tractor · 1989Unverified
Gravely Pro Master 20-H
Gravely Pro Master 20-H — Front-mount mower · 20 hp. Reference specifications; pending source verification.
Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.
Rated power
20 hp
Weight
444 kg
Hover a source tag to verify
Overview
ManufacturerGravely (a part of Ariens)Reference
Front-mount mowerReference
Two-wheel driveReference
Disc brakesReference
Open operator station.Reference
Engine
20HP Kohler 770cc 2-cyl gasolineReference
20HP Onan 781cc 2-cyl gasolineReference
Fuel tank20.1 LReference
Kohler M20Reference
gasolineReference
2-cylinderReference
air-cooled horizontal-shaft horizontally-opposedReference
Displacement46.98 ciReference
Bore/Stroke79 x 78 mmReference
Power (gross)14.9 kWReference
StarterelectricReference
Starter volts12Reference
Oil capacity1.9 LReference
OnanReference
air-cooledReference
Displacement47.7 ciReference
Bore/Stroke83 x 73 mmReference
Power14.9 kWReference
Transmission
hydrostaticReference
TransmissionEaton 850Reference
TypehydrostaticReference
Gearsinfinite forward and reverseReference
Oil capacity5.7 LReference
PTO & Hydraulics
Front PTOindependentReference
ClutchelectricReference
Dimensions
Weight444 kgReference
Front tire18x8.50-8Reference
Rear tire4.80/4.00-8Reference
Lawn/turf front18x8.50-8Reference
Lawn/turf rear4.80/4.00-8Reference
Length266 cmReference
Height121 cmReference
Gravely Pro Master 20-H attachments
50" front-mount mower deckReference
60" front-mount mower deckReference
Electrical
GroundnegativeReference
Charging amps15 (Kohler)Reference
Charging amps20 (Onan)Reference
Battery volts12Reference
Attachment overview
50" front-mount mower deckReference
60" front-mount mower deckReference
Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.