Hi,
Our boat did not have an anchor light or a mount for an antenna and when trying to disassemble all the bolts were seized. what we did to mount everything was to cutout a piece of 1/2" thick aluminum that fits onto a flap spot on the masthead casting. We used existing screw holes and flat head screws to attach the block. On top of the 1/2" thick block is a 1/8" aluminum plate that is drilled and matches tapped holes in the block. The antenna mount is then screwed to the 1/8" plate. We used a standard CD anchor light mount and cut down the mounting tube so the windex would clear the light. Maybe overengineered but looks like it will work well.
Our boat did not have an anchor light or a mount for an antenna and when trying to disassemble all the bolts were seized. what we did to mount everything was to cutout a piece of 1/2" thick aluminum that fits onto a flap spot on the masthead casting. We used existing screw holes and flat head screws to attach the block. On top of the 1/2" thick block is a 1/8" aluminum plate that is drilled and matches tapped holes in the block. The antenna mount is then screwed to the 1/8" plate. We used a standard CD anchor light mount and cut down the mounting tube so the windex would clear the light. Maybe overengineered but looks like it will work well.
