Product Overview 12 volt. 70 amp. Ignition protection screens. Internal regulator. Negative ground. 2 wire plug. 2-inch mounting foot. Single groove pulley included. Fits: Mercruiser, OMCThis product replaces:57-20104, 69300600114, 693006001142, 78477, 18-5951, 90794 Reviews (No reviews yet) Write a Review