Solenoid | Sierra 18-5812 Sierra Solenoid | 18-5812 12V grounded base starter solenoid and tilt & trim solenoid for many OMC sterndrive applications. Grounded base 12 volt 3 terminal posts Replaces OMC/Johnson/Evinrude 985063, 982187, 981410, 778014 Replaces Mallory 9-15107