| Engine Specifications |
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Size |
Disp (cc) |
Bore (mm) |
Stroke (mm) |
Output (hp/r.p.m.) |
Crankshaft |
Weight (oz) |
Prop Size |
Practical Range |
Parts |
| SK50A | 8.5 | 23.64 | 19.6 | 1.5/16500 | 1/4x28 | 16.61 | 11x6 | 2500-12000 | |
| SK70A | 12.3 | 25.5 | 24 | 2.2/16500 | 5/16x24 | 25.56 | 12x6 | 2500-11650 | Parts |
| SK80AR | 13.1 | 26.35 | 24 | 2.3/16000 | 5/16x24 | 25.96 | 13x6 | 2300-10900 | |
| SK90AR | 14.9 | 28.12 | 24 | 2.6/16000 | 5/16x24 | 25.96 | 13x8 | 2300-10400 | |
| SK110AR | 18.2 | 30.4 | 24.8 | 2.8/15800 | 5/16 X 24 | 33.09 | 15x8 | 2500-8700 | Parts |
| SK130AR | 21.4 | 31.2 | 28 | 3.1/15500 | 3/8 X 24 | 33.14 | 16x8 | 2500-8650 | Parts |
| 39A | 6.3 | 21.8 | 19.5 | 1.115/17000 | 1/4 X 28 | 13.9 | 10x6 | 2500-13500 | |
| 46A | 7.45 | 22 | 19.6 | 1.4/17000 | 1/4 X 28 | 16.6 | 11x6 | 2500-12200 | |
| 56A | 9.48 | 23.64 | 21.6 | 1.65/17000 | 1/4 X 28 | 16.6 | 11x6 | 2500-12200 | |