OUCH!
David: I had the same problem with the pan under my water heater as Steve (he and I have the same boat - '85 31's). In our case, the heaters are very likely on their last legs and I'm sure need to be replaced. I advised the new owners a new heater and mounting plate needed to be in their budget. I'll recommend to them they follow Steve's advice about the material. In your case, your heater is relatively new and should still be in good shape, so replacement of just the pan support below should suffice. I would like to quickly discuss your brief mention of non-use of your knotmeter. You are not a lone ranger when you said you stopped cleaning the impeller between sails because of the amount of water that gets into the boat every time you pull the thing. I was concerned about the same thing as well when I first bought TIDE in 86. The impeller/ depthsounder transducers on my boat are located in a very shallow pan directly abeam the head and just forward of the bilge. Not a lot of room for water to go except all over the cabin sole! A good friend and fellow 31 owner showed me a simple "trick" to keep water intrusion to a minimum. It may work for you. First of all, you have to have a blank impeller plug for your knotmeter (one should have come with the unit. If not, you can get one from the manufacturer). Second, get a fairly large bath-type towel and cover the area where the transducer is. I loosen everything up and place the blank right next to the impeller before I proceed to the next step of removing the impeller. Quickly remove the impeller and replace it with the blank, all under the towel. Some water does come in, but very little - about a quart, before I get the plug in. In our case, I leave the plug in until we use the boat again and then reverse the process. The towel both holds down the amount of water intrusion and keeps it from spraying all over the place. I hate to see you not using your knotmeter. After all, you paid for it! Hopefully my system will work for you. Good luck with your HW heater mount problem. Keep reminding yourself this is fun!!! Smooth Sailing.Tim Leighton (S. Chesapeake Bay)