My Cherubini 36 Bilge
Just last week I put my 1980 Cherubini 36 in the water for the first time since I bought it this past June. The packing box was restuffed, but as is normal (from what I read) a little bit of water is getting through which eventually builds up in the bilge. Also I know that this boat will have rain water leakage. (Eventually I hope to track down and fix the worst causes.) From the water stain mark in the bilge, the normal level that the past owner(s) experienced was about three inches in the aft part and one inch in the forward part. I didn't like the idea of this much water, particularly in the forward part since the steel post that supports the mast between the deck and the keel was constantly in the wet. I've read that eventually the post bottom rusts and the mast and deck begin to collapse downward. I want to delay the day when I will have to deal with this issue. Two inches is the level that the previous owners' bilge pump's float switch kicks in. The switch is located in the middle of the fore/aft bilge distance.For a solution, I had read in Don Casey's "Sailboat Maintenence Manual" about a very small capacity automatic Rule bilge pump that turns itself on for a few seconds every couple of minutes. It has a IC chip in it. If the chip senses current drain (i.e. the pump is pushing water), it keeps going. There is no float switch. If the "no water present" current draw is sensed, pump shuts off within a few seconds. Since the pump is small, the claim is that it draws insignificant current from the battery if no water is detected when it does its "water present?" check. This pump is intended only to deal with "trickle" leaks into the boat. The normal bilge pump system must be retained, whose float switch will rise and activate if the water ingress rate overwhelms the small pump's capacity.Since the bilge on my 1980 36 is deeper towards the aft than forward, I mounted the automatic rule pump as far aft in the bilge as I could. I also installed a separate 3/4" bilge hose for the small pump. Because the pump doesn't rely on a float switch to activate, it sucks out water right to the bilge's sole. Although when it shuts off, the small amount of water in the hose drains back down. The result looks to be good ... in the berth, only 1/2" of water is in the far aft section of the bilge. The forward three quarters of the bilge length stays dry totally.The Rule pump (12v 500 gph) is available at West Marine, and I did see it on-line at various marine sights. (I bought mine at West Marine since the price discount on line wasn't that much .... and because a West Marine $10 rewards program coupon had just come in the mail). The pump is quiet and with the bilge cover in place, it's noise is insignificant. That's my experience.