| Designation | 10H |
| Bore | 3/4 inch |
| Stroke | 3/4 inch |
| Length | 6 1/2 inches |
| Configuration | Horizontal single cylinder |
| Extra equipment | Drain cocks Displacement lubricator |
| Taps required | 5, 7, 8 BA 5/32 x 40 tpi 1/4 x 32 tpi 5/16 x 26 tpi |
| Notes | The archetypal beginners engine from Stuart, not quite as popular as the 10V vertical version but still with many examples made. Many parts are interchangeable with the 10V. The "Score", a twin-cylinder version, is quite rare (most people who wanted to make a twin made the Double 10 which was designed for powering larger boat models). |
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