Sierra's 18-7556 Crankshaft Sensor is designed for use in Mercury 5.0L and 6.2L (1998-2010) inboard engines. It is interchangeable with Indmar 556293 and Mercruiser Stern Drive 864297, 864297001, and 864297T01. Check manufacturer recommendations to ensure a proper fit before purchasing. Each Sierra product meets or exceeds the original equipment part it replaces.