Solenoid Assembly | Sierra Marine Parts 18-5801 Sierra Marine Parts Solenoid Assembly | 18-5801 Grounded base 12V starter solenoid fits many Mercruiser and OMC I/O applications. Grounded base 12 volt 4 terminal posts Replaces Indmar 755005 | Replaces Mercury 89-76416A1 | Replaces OMC 586842, 586730, 985064, 982189, 980801, 981703, 3853839 | Replaces Pleasurecraft R130001 | Replaces Volvo Penta 3853839 | Replaces Mallory 9-15105 | Replaces Prestolite 15-394