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| Type | Opposed cylinder twin, two-stroke cycle, crankcase scavenged |
| Bore | 66.0 mm |
| Stroke | 42.4 mm |
| Rod, length | 73.0 mm |
| Displacement | 290 cc |
| Dual carburetors, progressive linkage | 21mm venturi, 28mm throttle bore |
| Shaft power | 25.5 SAE HP @ 7750 rpm |
| Belt drive | Gates Polychain GT2 belt, 21mm width, 36/60 ratio |
| Weight | 10.2 kg (22.4 lb) |
| Fuel consumption |
Cruise: 0.64 lb fuel/hp-hour Full power: 0.78 lb fuel/hp-hour |
| Fuel | 87 min octane gasoline with 2% premixed oil |
| Ignition, CD-type | 28 vdc input, aircraft quality HV leads, with tachometer signal |
| Crankshaft assembly | 3-piece, pressed together, supported by three widely spaced ball bearings, one-piece con rods |
| Propeller reduction | 36/60 ratio, 21mm wide polychain belt, 0.8 lb flywheel to absorb peak torque, eccentric belt tensioner |
| Typical 2-blade propeller | 34-inch dia x 28-inch pitch |
