The Aeromotor was designed as a water pumping engine, and was used to suppliment wind power. They were found under windmills, connected to a hand/ wind pump using a walking beam. When there was no wind, water could be pumped by using the engine, thus the inclusion of the pump jack gearing integral to the engine.

The Aeromotor was designed for efficiency, and for use in harsh conditions. One evidence is through the 8 stroke cycle. On the first half of the cycle, or four strokes, the engine is as a standard 4-stroker. But the cam has a high section for half of it's revolution, which holds the exhaust valve open. Gearing is 1:4 from the timing pinion to the timing gear.This open time allows air to cool the inside of the cylinder for half of the cycle. The Aeromotor is also air cooled, which allowed operation in cold climates without the problems with freezing the coolant.

Fuel is only taken in on the intake stroke, and is by suction. you can hear the valve slurp during the intake cycle. Also, to add to the Aeromotors efficiency, it has a hit-n-miss governor, allowing the engine to idle for several cycles between hits.

Arnold Teagues of "Pieces of 8" was the original designer of this 3/8 scale Aeromotor model and pump. He has retired, and I was fortunatly able to obtain rights to continue availability of this fine model. My hat is off to him.

The model is a 3/8 scale of the original. All castings are iron. as are those of the original. Ignition design is by ignitor, and the model runs beautifully on coleman fuel.

14 Iron Castings: engine block, 2 bearing blocks, exhaust port, flywheel, bull gear, timing gear, timing pinion, governor detent, ignitor, intake port, piston, pulley, connecting rod, valve pushrod and instruction booklet with prints

7 Iron Castings: base, stem, pump body, pump rod guide, spout, handle, and handle bracket, and print