Introduced: 1979 Discontinued: this engine is still in production. Replaced: Mamod Minor 2 Number produced at the end of 1995: 36,878 Minor Variations in the type:

• Engine frame was changed from blue to black at a later date
• Some engine frames are screwed on some are riveted on
• Some sight glasses were screwed on some were riveted on
• Sight glass cover was either chrome or brass.

The SP2 (Steam power 2) was an all new design. It replaced the Mamod Minor 2 and was similar to it in a few ways. This engine had the same sort of boiler as the Minor 2 and engine unit and frame. These engines where very powerful despite there size and could drive the whole set of tools easily. The exhaust was a straight out type like the sp1. The engine frames on these where also painted black at a later date like the SP1. A version of the SP2 with an integral dynamo is also produced. Called the SP2D, these models feature a larger-diameter flywheel. The dynamo is mounted at the base of the chimney and driven by a belt from the flywheel. A small bulb is fitted to the top of the chimney to provide load, but the dynamo can be wired into larger circuits if needed.