The evolution of the Super Speedmaster

[Raceman]

ALL OF THESE UNITS PICTURED HERE WOULD HAVE BEEN AVAILABLE SOLID BLACK ONLY. ALL OF THE PAINT REMOVAL WAS DONE BY OWNERS. The paint in the second picture is partially removed by bead blasting.

The first picture is the MC1 (Mercruiser 1), also referred to as 1 SSM and "Marathon". As the name implies it was originally designed for the Mercruisers, which were all small blocks at the time. This unit was available in at least 2 driveshaft configurations, the very short, fine splined one for the Mercruiser drive and the 15" one for a standard short shaft Merc. These were standard on the first Twisters before the SSM became available.

Notice how much larger it is than the others in this series and the exhaust outlet has the large opening and slanted angle. Also, not as plain in this picture is the large "Patent Pending" above the cavitation plate. Another sign of this unit is the skeg's trailing edge position being rearward in comparison with all the others. Another unique cosmetic detail is the rear edge of the area above the propshaft and below the cavitation plate. It is approx. 1/2" thick in this area while the other units taper back to a sharp edge.