Mercury Mark 35a-55-55a-58a Lower Unit Gear Case Cover Tool


This is a gear case cover spanner tool for the Mercury Mark 35-55-58 Merc 650-500-450-400-350-300 lower units of the 1950’s and 60’s. This is the tool that removes the large nut behind the prop and the one you will need if you are going to do any service on one of these gear cases.