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Mamod SE1


The 1946 version of the SE1 is interesting in that it is very similar to the pre-war (1937) version, with minor differences. It was only made in this form for a few months before a new version was introduced with a boiler mounted chimney.

The boiler is heated with a wick type meths burner. It was acquired with a single wick one but I believe it was originally supplied with a two wick version. The boiler is 1 3/4" diameter x 3 1/2" long. It has a safety valve and a compression fitting for the steam pipe. There is no water level indication and the chimney is mounted on the base.

The steam feed pipe is soldered directly to the back of the cast brass engine frame, with no regulator or lubricator. The single cylinder is a single acting oscillating type; 5/16" bore x 9/16" stroke. The short piston rod connects to a 1 1/4" diameter (mazac?) disk crank, which also acts as a flywheel. The crank shaft passes through the frame casting with a small brass pulley on the other end. Unlike the pre-war version, exhaust steam is fed to the chimney near the base.

The last photo on the left shows the engine as acquired. The firebox and disk crank had been painted with gold paint (which rubbed off with handling). The rest of the paintwork appeared to be original. The paint on the base was flaking but there was very little rust. The burner was a single wick type which may or may not be original. The exhaust pipe had been soldered to the chimney; which was not correct.

I have since removed the solder from the chimney and repainted the firebox, base and disk crank.I left the paint on the engine frame as it was.

Make Model Made Description Cylinders Cylinder Type
Mamod SE1 1946 Stationary 1 single acting
Piston Diam mm Stroke mm Valve Type Boiler Type Fuel Mechanical Condition
8 14 Oscillating cylinder Horizontal meths Fair
Cosmetic Condition Paintwork Packaging Purchased Purchase cost Additional cost
fair Partly repainted
Jan 2013 215