本SAE推荐实施规程适用于功率输出不超过14.9 kW（20 hp）和/或排量不超过0.82 L（50 in）的家用四循环风冷和水冷发动机，带水平或垂直曲轴。

This SAE Recommended Practice applies to domestic four-cycle air- and water-cooled engines having a maximum of 14.9 kW (20 hp) or less in power output and/or 0.82 L (50 in) or less in displacement, with horizontal or vertical crankshafts.