Massey-Harris Pacemaker: all source data

All 42 values recorded for this model, as the source lists them and in its units. The spec sheet shows the same data checked, typed and converted.

Overview

Production
Manufacturer	Massey-Harris
(no label)	Standard-tread tractor
(no label)	Built in Racine, Wisconsin, USA
(no label)	The Massey-Harris Pacemaker replaced the Wallis 12/20 in Massey's line. The Twin Power feature increased engine rpms to provide additional horsepower for belt work. The Pacemaker was a standard (wide) front tractor, while the Challenger was the row-crop version.

Engine
(no label)	Massey-Harris 4.1L 4-cyl gasoline
Fuel tank	18 gal \| 68.1 L
Aux. fuel	1.6 gal \| 6.1 L

Transmission
(no label)	4-speed gear

Power
Drawbar (claimed)	16 hp \| 11.9 kW
Belt (claimed)	27 hp \| 20.1 kW
Drawbar (tested)	30.58 hp \| 22.8 kW
Belt (tested)	42.13 hp \| 31.4 kW

Mechanical
(no label)	Two-wheel drive
(no label)	Manual steering
(no label)	Open operator station.

Dimensions
Wheelbase	78 inches \| 198 cm
Weight	3700 lbs \| 1678 kg
Front tire	28x5
Rear tire	44x10

Belt pulley
Diameter	12 inches \| 30 cm
Width	6.25 inches \| 15 cm
RPM	832

Engine

Engine detail
(no label)	Massey-Harris
(no label)	gasoline
(no label)	4-cylinder
(no label)	liquid-cooled vertical I-head
Displacement	247.7 ci \| 4.1 L
Bore/Stroke	3.875x5.25 inches \| 98 x 133 mm
Rated RPM	1200
Rated RPM	1400
Coolant capacity (Coolant)	20 qts \| 18.9 L

Transmission

Transmission
Type	gear
Gears	4 forward and 1 reverse
Clutch	mechanical dry disc

Dimensions

Tires
Ag front	28x5 steel
Ag rear	44x10 steel
Ag front	6.00x16
Ag rear	11.25x24

Dimensions
Wheelbase	78 inches \| 198 cm
Length	122 inches \| 309 cm
Height	53 inches \| 134 cm
Weight	3700 lbs \| 1678 kg