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Mamod SE2


This was one of Mamod's "second generation" of engines created when they generally redesigned their whole range in the mid 1950s. This generation was characterised by the pressed steel base (earlier ones had a plain flat base), and a new style of engine frame. It is a sort of transition stage between the early models and the ones that came a few years later with the vapourising burner and pop-riveted construction.

The SE2 was interesting in that it had the throttle situated in the engine exhaust. I know of no particular advantage of this design feature and, indeed, the idea didn't last into the next generation. The boiler is 1 3/4" dia x 4 7/8" long. It has the 3/8" safety valve and a slightly oversized whistle (which seems to be original). The insert into which the whistle screws was loose when purchased so it had to be resoldered. The fitting for the steam feed pipe had a damaged thread so that it became loose when I was trying to re-fit it after restoration. This was also resoldered.

The feed pipe goes under the boiler in traditional Mamod fashion (to provide some superheating) and then directly to the cylinder. It has no lubricator or reverser. The throttle is built into the cylinder mounting block on the exhaust side. The single acting oscillating cylinder is 5/16" dia x 3/4" stroke. The exhaust is fed, as usual, to the base of the chimney.

The meths burner was missing when bought so I have replaced it with a brand new one. It is a round double wick type.

The bottom photo shows the engine in it's "as acquired" condition. It looks a lot better than it actually was because, not only was the whistle loose and the feed pipe fitting damaged, but the whistle, safety valve and overflow plug were so badly "furred" that they were difficult to remove and had to be soaked in vinegar for a few hours. The engine had obviously been well used in a hard water area. The paintwork was in poor condition and the steel parts had begun to rust in places. I stripped everything down to the bare metal and repainted. Unfortunately, this meant that the Mamod transfer was lost, but it wasn't in good condition anyway. (New transfers are available and I might replace it at some time in the future.) The boiler securing band was rusty so I replaced it with a spare I had in better condition.

Make Model Made Description Cylinders Cylinder Type
Mamod SE2 c1954 Stationary 1 Single acting
Bore mm Stroke mm Valve Type Boiler Type Fuel Mechanical Condition
8 19 Oscillating Cylinder Horizontal Meths Restored
Cosmetic Condition Paintwork Packaging Purchased Purchase cost Additional cost
Restored Restored
Sep 2005 21.00 12.50