Solenoid | Sierra 18-5814 Sierra Solenoid | Sierra 18-5814 Isolated base12V starter solenoid and tilt & trim solenoid for many Johnson & Evinrude outboard applications. Isolated base 12 volt Replaces OMC/Johnson/Evinrude 581528, 172869 Replaces Mercury 802139A1, 802139 Replaces Mallory 9-15108