Our new-to-us boat has a Wilcox-Crittenden "Head-Mate" Seaclos head. It was pumping water in anaemically all along, but, on the trip bringing her home, it's apparently given up the ghost entirely. It pumps out kinda more or lesser okay, but now pumps no water in whatsoever. (Found a use for all those used water bottles. Put a pail over the side, and fill 'em up from that. Stow in the head
So, the question is: Rebuild (rebuild kit is about USD70 at West Marine) or replace? Are newer units more efficient at pumping water in and evacuating the bowl?