Wellard Street, Serpentine, WA, 6125

Work Hours
Mon-Tues: Closed
Wednesday: 9am-1pm
Thur-Fri: Closed
Sat-Sun: 10am-3pm
Public Holidays: 10am-3pm

Note: Closed on Good Friday and Christmas Day

McDonald CPI Diesel - 1963


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The Museum’s CPI McDonald engine was built in 1963 and is the bigger version of the SPI model and a follow-on from the earlier CE. With the pressure injection the horse power was increased from 3hp to 6-7hp at 600rpm

Technical Specifications: Single-cylinder, 4-stroke, water-hopper cooled, horizontal diesel. Bore 4⅛” and 4½” stroke producing 6-7hp at 600rpm.

History: While the Brons injector system had served the C series engines well from 1918 to 1949 it was not without problems, which necessitated McDonald having to modify the injector from a 2 to a 1 pin injector rod. Eventually the Brons system was phased out completely and replaced by the better fuel atomisation of the Bosch system.

McDonald CPI Diesel - 1963
McDonald CPI Diesel - 1963