The 2703 was developed as a competitor to the 50 hp (37 kW)
Rotax 503 and is similar to the
Rotax powerplant in being a two-cylinder in-line engine, with dual
capacitor discharge ignition. The 2702 was developed from the 2703 as a de-rated version.[1][2]
Both the 2702 and 2703 use free air or fan cooling, with Bing 34mm slide carburetors. The cylinder walls are electrochemically coated with
Nikasil. Standard starting is
recoil start. Reduction drive systems available are the G-50 gearbox with reduction ratios of 2.16:1, 2.29:1, 2.59:1, 3.16:1, or 3.65:1, or a multi-element cog belt drive. A tuned exhaust and electric start are optional.[1][2][3]
Twin-cylinder in-line, two stroke, aircraft engine with a single Bing 34mm slide carburetor. Produces 40 hp (30 kW) at 5500 rpm and has a factory rated
TBO of 1200 hours. Still in production.[2][4]
2703
Twin-cylinder in-line, two stroke, aircraft engine with dual or optionally a single Bing 34mm slide carburetor. Produces 55 hp (41 kW) at 6200 rpm and has a factory rated TBO of 1000 hours. The 2703 has been largely supplanted in production by the
Hirth 3202, but in 2009 was still available as a special order from the factory.[1][3][4]
Dry weight: 70 lb (31.8 kg) with free air cooling, 76 lb (34.5 kg) with fan cooling, including recoil starter and exhaust. G-50 gearbox adds an additional 19 lb (8.6 kg)