The Fordson Model F Tractor was produced between 1917 and 1928.  Initial production was at Dearborn in the U.S.A. with production commencing in Cork, Republic of Ireland in 1919.  The engine was a four cylinder side-valve unit which produced 20 h.p. at 1,000 r.p.m.  Ignition was identical to that used in the Model T Ford car and consisted of a low-tension flywheel magneto and high tension coils.  The clutch was of the multiple disc in oil type, final drive was by worm-gears.  Lubrication was of the splash type, oil was caught in a funnel and conducted to individual trays in which the connecting-rod cap projections were dipped.  Engine cooling was by the Thermosyphon method.