I just took out a leaking Signet Knotlog through hull and need to put
a new one in the hole with proper bedding. For some reason, the new
fitting has a slightly thinner flange. The original hole was also not
to the tolerances I would have liked to have found. The means that
there will be quite a bit of bedding compound behind the flange.

My plan is to put the fitting in the hole flush with the hole and let
the compound set up before taking up on the nut inside. I could also
put some wax on the fitting, set it in epoxy paste, remove and clean
it, and then do final installation to achieve a thinner gasket of
bedding compound.

Any recommendations on which goop to used if I go the first route and
want something that will take the compression of the nut and hold
together?

Any strong feelings that I should do it in two steps to try and get
the tapered flange hole to tighter tolerances? If this was a piping
through hull where there could be stress on the fitting from the
inside, I would definitely rework the hole but the wire for the speed
sensor isn’t going to put any strain on it.

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Roger Long