SIERRA VOLTAGE REGULATOR MERCU SIERRA 18-99421

Fits most Mercruiser engines using a water cooled regulator/rectifier
Replaces: 86255A, 3 77305A, 2 86255A, 2 99502A 4, 99502A, 7 99502A, 8 99502A, 9 99502A12, 99502A13