| Engine Specifications |
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Size |
Disp (cc) |
Bore (mm) |
Stroke (mm) |
Output (hp/rpm) |
Crankshaft |
Weight (oz) |
Prop Size |
Practical Range |
Parts |
| 32AR | 5.2 | 19.8 | 17 | 0.8/17000 | 1/4x28 | 13.50 | 9x5 | 2500-13500 | |
| 36AR | 5.9 | 21 | 17 | 1.0/17000 | 1/4x28 | 13.50 | 9x6 | 2500-13500 | |
| 39AR | 6.3 | 21.8 | 17 | 1.15/17000 | 1/4x28 | 13.50 | 9x7 | 2500-13500 | |
| 40A | 6.8 | 20.5 | 19.6 | 1.21/16500 | 1.4x28 | 16.61 | 10x6 | 2500-12700 | |
| 46A | 7.45 | 22 | 19.6 | 1.4/17000 | 1.4x28 | 16.61 | 10x7 | 2500-12700 | |
| 52A | 8.2 | 22 | 21.6 | 1.45/17500 | 1.4x28 | 16.61 | 11x7 | 2500-12700 | |
| 56AR | 9.2 | 23.24 | 21.6 | 1.65/17500 | 1/4x28 | 16.61 | 11x7 | 2500-11600 | |
| 61A | 9.97 | 23.5 | 23 | 1.8/17500 | 5/16x24 | 25.96 | 12x6 | 2500-11800 | |
| 75A/AR | 12.29 | 25.5 | 24 | 2.1/17000 | 5/16x24 | 25.96 | 13x6 | 2500-11500 | |
| 91AR II | 14.9 | 28.12 | 24 | 2.4/17000 | 5/16x24 | 25.96 | 13x8 | 2500-10500 | |
| 91A/AR | 14.95 | 27.7 | 24.8 | 2.4/17000 | 5/16x24 | 33.09 | 13x8 | 2500-10500 | |
| 108A/AR | 17.8 | 29 | 27 | 2.8/17000 | 3/8x24 | 33.09 | 14x6 | 2500-10500 | |
| 120A/AR | 19.79 | 30 | 28 | 3.1/17000 | 3/8x24 | 33.09 | 14x8 | 2500-10200 | |
