Four-stroke Petrol Engine Model

Represents a typical air cooled, side-valve four-stroke petrol engine with the operation of the valves 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. LED operated by 2AA size battery (not included). Cross-section of carburetor is shown. Mounted on base. This large model measures 28 x 20 x 12. 5 cm and is mounted on an 20 x 20 x 2.5 cm base. Supplied with manual.