Premium Replacement Ignition Sensor for Mercruiser Outboard EnginesThis ignition sensor fits GM V-6 & V-8 Engines with Thunderbolt IV and V Ignition.Replaces:MERCRUISER Ignition Sensor 87-892150Q02MERCRUISER Ignition Sensor 892150A02MERCRUISER Ignition Sensor 861780A2MERCRUISER Ignition Sensor 91019A6MERCRUISER Ignition Sensor 861780Q4MERCRUISER Ignition Sensor 861780A4MERCRUISER Ignition Sensor 91019A3MERCRUISER Ignition Sensor 91019A2SIERRA Ignition Sensor 18-5116-1 *ARCO Assurance 12-month part and labor warranty protection  This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.