Gravely lawn tractors

Gravely Pro Master 18-H

The Gravely Pro Master 18-H is a front-mount mower lawn tractor produced from 1989 to 1991. It features an 18 hp Kohler M18 gasoline engine with 691 cc displacement, hydrostatic transmission, and two-wheel drive with disc brakes. The tractor has an open operator station and is equipped with front PTO that is independent and uses an electric clutch. It weighs 980 lbs with the 60-inch mower attached and rides on 18x8.50-8 front tires and 4.80/4.00-8 rear tires. Electrical system includes a 12-volt battery with 15 amps charging and negative ground. Attachments include 50-inch and 60-inch front-mount mower decks with hydraulic lift and right discharge.

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ModelPro Master 18-H

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Technical Specifications

Detailed specifications and technical data for Gravely Pro Master 18-H

Tires

Rear tire	4.80/4.00-8
Front tire	18x8.50-8

Engine

Type	gasoline
Cooling	air-cooled horizontal-shaft horizontally-opposed
Starter	electric
Cylinders	2-cylinder
Fuel tank	5.3 gal (20.1 L)
Bore/Stroke	3.12x2.75 inches (79 x 70 mm)
Displacement	691 cc (42.18 ci)
Engine model	Kohler M18
Oil capacity	2 qts (1.9 L)
Power (gross)	18 hp (13.4 kW)
Starter volts	12

Dimensions

Height	48 inches (121 cm)
Length	105 inches (266 cm)
Weight	980 lbs (444 kg) *Weight with 60-inch mower

Electrical

Ground	negative
Battery volts	12
Charging amps	15

Mechanical

Drive	Two-wheel drive
Brakes	Disc brakes
Operator station	Open operator station.

Production

Type	Front-mount mower
Years made	1989 - 1991

Attachments

50" front-mount mower deck	Lifthydraulic lift Mountfront-mount Width50 inches (127 cm) Blades3-blade Weight215 lbs (97 kg) Dischargeright-discharge Cut height1 to 4 inch (2 to 10 cm) ManufacturerGravely
60" front-mount mower deck	Lifthydraulic lift Mountfront-mount Width60 inches (152 cm) Blades3-blade Weight297 lbs (134 kg) Dischargeright-discharge Cut height1 to 4 inch (2 to 10 cm) ManufacturerGravely