Engine Specifications: 30HMHS, 30HMHL & 30HWL, 25BMHS & 25BMHL
| Engine Type | In-line 2 |
| Displacement | 496cm³ |
| Bore x Stroke | 72.0 x 61.0mm |
| Compression ratio | 6.2:1 |
| Starting enrichment | Manual choke |
| Scavenging | Loop Charge |
| Fuel induction system | 1 Carburettors |
| Lubrication system | Pre-mixed Fuel and Oil |
| Oil-Fuel Mixing Ratio | 50:1 (ZAF 100:1) |
| Engine oil capacity | – |
| Ignition system | CDI |
| Ignition timing | ATDC 2.0 – BTDC 22.0 deg. ATCD 2.0 – BTDC 25.0 deg. |
| Spark plug | B7HS-10, B8HS-10 |
| Alternator | 80 W (W, WC: 6 A) 80 W (W, WC, WH: 6 A) |
| Cooling system | Raw-water, thermostatically controlled |
| Exhaust system | Through Propeller Boss |
| Dry weight 30H | 53 – 58kg |
| Dry weight 25B | 53 – 57kg |