Solenoid | Sierra 18-5802 Sierra Solenoid | 18-5802 12V grounded base starter solenoid fits many Mercruiser applications. Grounded base 12 volt 4 terminal posts Replaces Mercury 65057T1, 65057A1, 65057 and 54981 | Replaces OMC/Johnson/Evinrude 508908 | Replaces Mallory 9-15106