Another four-stroke champion to test. The single-cylinder 6 Hp Oyster is the only product in Europe with an OHC (Over Head Cam) structure, the overhead camshaft that reduces exhaust emissions to a minimum. It is a high performance, light, compact product with low fuel consumption. Clean as a 4-stroke and easy to manage as a 2-stroke.
| Bore x Stroke (mm) | 57 x 53 |
| N° Cylinders | 1 |
| Induction | 1 carburettor |
| Starting | Manual |
| Fuel | Petrol (for specifications see the user manual) |
| Fuel tank (L) | Separate 12 or built-in 1,8 |
| Lubrication | Forced with mechanical lobe-pump |
| Ignition | C.D.I. Digital |
| Ignition timing | Electronic |
| Starting | Manual |
| Alternator | Optional 12V/70W with regulator |
| Cooling | Water cooled with pump-forced circulation |
| Exhaust | Underwater through propeller |
| Steering system | Bar with twist grip throttle control and steering friction adjustment |
| Trim adjustment | Manual (4 pos) with trim for navigation in shallow waters |
| Direction reversal | Mechanical A-F-R + 360° shaft rotation |
| Transmission ratio | 13/30 |
| Available shaft versions | C. - L. |
| Standard propeller type | 3-bladed with built-in spring drive |
| Weight basic version (Kg) | 27 |
