Aside: Why is it called a "head" you may ask? On the old sailing ships, the sailors were not provided with "facilities" of any kind whatsoever. When nature called, they had to go up into the bows of the ship, into the very head, and do their business as best they could, hanging on to the rigging while the bow plunged into wave after wave. There was a scene in Master and Commander that depicted this in the movie theaters (that scene was relegated to the "deleted scenes" on the DVD). Not very pleasant at any time, and downright nasty in the winter. I'm pretty sure I couldn't do it.The forward head, despite the investment of more than $100 in parts will still not pump sea water for the flush. Instead, we have been using the shower hose to supply flush water when needed. I became convinced to try a Jabsco head, for $154, instead of investing another $100 in parts to attempt another repair of the fragile mechanism inside the old Groco head.
So we bought one. Aside from the usuals, it has a nice feature: if you push down the pump handle and twist it, both the inlet (sea water) and the outlet (waste) are closed off tight. At least so it says. (Pardon my lack of faith in heads.) It does look like it will be easy to rebuild, when the time comes.
The floor area where the head was mounted needs to be refinished. I tied the hoses up out of the way, and once things dry out I will get out the sandpaper and varnish.