Curved Bracket Solenoid | Sierra 18-5817 Sierra Curved Bracket Solenoid | 18-5817 12V isolated base starter solenoid and tilt & trim solenoid for various Mercury and Mercruiser applications. Fits many Mercury and Mercruiser applications Isolated base 12 volt Curved bracket Replaces Mercury 89-96158T, 89-96158, 89-846070, 89-94318, 89-96158B Replaces Mallory 9-15112