Two Stroke Petrol Engine Model Sectional, to enable all moving parts to be seen clearly. Where required, a simple carburettor is depicted in cross section, & a low voltage bulb is used to simulate action of spark plug. Internal passages are suitably coloured to show nature of gases passing through them. All models are of cast alloy and each is fitted on a base . Showing internal structure & perating principles of a simple piston air cooled two stroke engine, Mounted on a polished wood base with schematic diagram, overall height 360 mm approx.