The Rotax 1503 engine is an engineering masterpiece, the only 4 stroke engine specifically designed for watercraft use, the only watercraft engine with a closed loop cooling system. It is now available in several variations from the new 135hp found in the 2006 GTI range right up to the wopping 215hp supercharged intercooled monster available in various Sea doo jet boats.
It has 1503cc 3 cylinder’s single overhead cam pushing 12 valves. The engine is a dry sump variety running with twin oil pumps and a tip over protection system to stop the oil from flowing to unwanted areas in the case of the watercraft being inverted.Valve timing is designed in such a way that every time you turn off your 4 tec equipped Sea doo the engine will stop with all 12 valves firmly closed to make water ingression almost impossible.
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