Oliver,
At first glance/going from memory, it looks like the stop the mast's furling tube bushing rides against. It’s tapped into the internal part of the whole block assembly that the boom attaches to. How both screws backed out is a mystery, unless the tore out with some other force from the furling tube? for me, it’s been a couple years since that was removed, so I’m sure others can add more detail. 

Jay Friedland
S/V Wanderlust ‘97

 

> On Sep 23, 2018, at 11:24 AM, Olivier Hecht <oehecht at gmail.com> wrote:
> 
> And where it goes?  It’s a plastic block about 1”x2” with two long screws
> through it.
> 
> I was raising the pop top yesterday and this fell to the deck. It seemed to
> come right from the mast/boom/gooseneck area but I didn’t see exactly where
> it came from or an obvious place for it.
> 
> I did not notice any effects while sailing for four hours. It looks like a
> stop of some sort, maybe when the sail is lowered in the mast?  I didn’t
> see any mounting holes when I looked in the mast, though.
> 
> Olivier
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