Sierra International  18-5108 Pick Up Coil Sensor Sierra Pick Up Coil Sensor Meets or exceeds the original equipment quality Sierra part number: 18-5108 Interchangeable with the following: GLM 72130, Mercruiser 811639, 811639T, 802465, 850489, OMC 3854001, 988642, Volvo Penta 3854001