Most automobile engines are

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Lawn mowers and outboard engines are two-cycle. They are used wherever horsepower is needed in a lightweight package. They run very fast in order to produce power. Four-cycle engines are used in automobiles, where various conditions exist and load variations are greater. One exception is the rotary or Wankel engine, which uses a rotary design tC.nvert pressure into rotating motion instead of using reciprocating pistons.

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