Petrol Engine, Four stroke

Product Code: 1288600

Represents a typical air cooled, side-valve, four stroke petrol engine with the operation of the valves clearly evident. Cam operated inlet and exhaust valves being driven by a gear train from rear of the main crank. As with the two-stroke model, spark plug simulated through a small lamp to indicate the firing point. Cross-section of carburetor is shown. With printed diagram and key.

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