Engine Specifications – 90AETOL
| Engine Type | In-line 3 |
| Displacement | 1140cm³ |
| Bore x Stroke | 82.0 x 72.0mm |
| Compression ratio | – |
| Starting enrichment | Prime Start |
| Scavenging | Loop Charge |
| Fuel induction system | 3 Carburettors |
| Lubrication system | Oil Injection |
| Oil-Fuel Mixing Ratio | – |
| Engine oil capacity | 3.3L |
| Ignition system | CDI |
| Ignition timing | ATDC 8.0 – BTDC 22.0 deg. |
| Spark plug | B8HS-10 |
| Alternator | 10 A |
| Cooling system | Raw-water, thermostatically controlled |
| Exhaust system | Through Propeller Boss |
| Dry weight | 121 – 126kg |