Description

Represent a typical air cooled, side-value four-stroke petrol engine with the operation of the value clearly evident, cams being driven by a gear train from rear of the main crank. As with the two- stroke model, simulated spark plug uses a small lamp to indicate the firing point. Screw terminals are provided for connection to 3 Volts battery. Cross section of carburetor is shown. Mounted on base, with printed diagram showing working.