Model WMB

    The WMB engine is an improved version of Briggs and Stratton’s WM design that was specially built to meet the large demand for washing machines (WM) in rural North America before electricity was installed on the farms. The improvements to the ‘B’ version included having the spark plug located back on top of the cylinder head and an improved governor vane. The WM engines were replaced on washing machines by these engines starting in 1938. This engine has a foot pedal start mechanism, was built in 1940, is serial numbered 135335 and rated at 2/3 hp.