Re: 1975 Mercury 200 Gearcase Removal

[20mercman]

Yes there is an allen nut that holds the anode on that is accessed through the hole in the top of the rear of the mid-section. I think that it is 5/16", but can’t remember for sure. You can shine a small light down the hole to get a look at it. The anode must be removed to gain access to the other attaching bolt. You may need to use a sharp probe and compressed air to clean out the recess in the allen bolt if the area has that much corrosion the opening of the bolt may be filled with debris.

Steve