| Engine | Displacement | Bore & Stroke | Power output (max.) | Net Torque |
| HH (Horizontal-Heavy Duty) series | ||||
| HH100 | 389 cc (23.7 cu.in.) | 84.1 x 69.8 mm (3.31 x 2.75 in.) | 10.0 HP | – |
| HH160 | 453 cc (27.6 cu.in.) | 88.9 x 69.8 mm (3.50 x 2.75 in.) | 16.0 HP | – |
| OH (Horizontal-Heavy Duty with valve-in-head design) series | ||||
| OH160 | 453 cc (27.6 cu.in.) | 88.9 x 69.8 mm (3.50 x 2.75 in.) | 16.0 HP | – |
| V (Vertical) series | ||||
| V50 | 200 cc (12.2 cu.in.) | 66.7 x 57.2 mm (2.62 x 2.25 in.) | 5.0 HP | – |
| V60 | 221 cc (13.5 cu.in.) | 66.7 x 63.5 mm (2.62 x 2.50 in.) | 6.0 HP | – |
| VH (Vertical Heavy Duty) series | ||||
| VH60 | 221 cc (13.5 cu.in.) | 66.7 x 63.5 mm (2.62 x 2.50 in.) | 6.0 HP | – |
