The ME2 is similar to the ME1 but with the Mamod engine unit mounted vertically and no propeller / stern tube. It was not manufactured for long and was soon replaced by the ME3, which used the SEL engine unit.
The boiler is 1 3/4" dia x 4", covered by an aluminium cowling. It has a water level plug and a combined filler / safety valve / steam dome. It is mounted in traditional manner over a typical Mamod vapourising burner. The steam pipe exits from the side of the dome and, without any superheating, or control, directly to the engine unit.
The cylinder is a single acting oscilating cylinder type, mounted vertically on a cast frame. It is 5/16" bore x 5/8" stroke. It utilises the felt pad lubrication system for the port face, fed from a small lubricator on the top of the casting. The oil also runs down a groove in the casting to the crankshaft. The crankshaft has a 1" diameter flywheel fitted with a crank pin. It has a small combined pulley and coupling for a propeller shaft at the rear end.
The paintwork is original and mostly in good condition. There is some rust on the firebox. The engine unit itself is in good condition. When first acquired, the main problem was that the boiler had de-zincification resulting in at least one pin-hole (see last photo on the left). I was reluctant to do a repair on the boiler because this is a rare model. I later replaced the boiler with one from an ME1 of the same era.