The Viking Non-Certified aircraft engines  are based on used Mitsubishi and Honda automobile engines of recent production removed from cars that are uneconomical to repair. Their models come in multiple horsepower ranges (from 90 hp up to 195 hp). All engines are geared, liquid cooled with a fuel injection system. 

Features of their Honda based engines include liquid cooling, Honda direct gasoline fuel injection system, 4 coil ignition system, lifetime chain camshaft drive, integral exhaust manifold cast into cylinder head, off-set crank shaft and friction reduction coating throughout the engine, variable valve lift and timing, Honda racing technology parts, 40 amp genuine Nippon Denso alternator, custom Mil-spec jacketed wire loom, 3 gear gearbox for Lycoming style propeller rotation and vertical engine orientation, forged, heat treated and ground helical gears, dual overhead camshafts, original Honda tuned intake system, 2.33:1 gearbox ratio.