The D14 is an overtype stationary engine, with the engine components mounted on top of the boiler.
The boiler is a typical Wilesco type, 130mm long x 55mm diameter. It has a circular window type water level sight glass on one end, a spring type safety valve and a dome type whistle. The whistle is fitted to an extension, which also supports the engine frame.
Steam is fed directly to the bottom of the steam chest. There is an oiling point on the top of the steam chest. The cylinder is double acting with a cylindrical slide valve, controlled by a slip eccentric for reversing. Bore is 13mm and stroke 16mm. Exhaust is fed to be base of the chimney. The crankshaft is fitted with a 79mm diameter 5 spoke flywheel and a double pulley.
As acquired, the engine is in an almost mint condition. It is not unused but has not been used much.The burner tray is unused so the engine must have been fired by some other means.