NOT HARD TO DO YOURSELF, BUT...
Lyne: Jim is absolutely right with his idea of hiring a good diesel mechanic, especially for new owners like yourselves. As long as you can watch and learn, you will absorb far more useful info than it costs for the mechanic to winterize the boat. Remember though, the engine is just one part of the winterization process. You need to "pickle" the fresh water system, head/holding tank, and yes, even the bilge. Anywhere water (or its byproducts) can freeze. Still, if you want to do it yourselves, it really isn't hard, but I don't know of any book which details the process. Every year or so SAIL and Cruising World magazines run a series of articles on winterization techniques, but I'm not sure when the last time was. You could look them up on the net and see if you can get back issues. Here's a "Readers Digest" version of what I do down here on the S. Chesapeake Bay (where it really doesn't get cold until Jan and then only for a few weeks): - I drain the water tank, hot water heater, and all lines as much as possible (lines can be drained by removing them at one of the fittings and blowing compressed air...I just disconnect and let gravity do its work). I leave the lines unconnected through the winter to allow any remaining water room to expand without back pressure. I then add, believe it or not, a diluted solution of the cheapest Vodka I can find to the tank and allow a bit to flow to the hot water heater. A bit more expensive than using the purple stuff, but doesn't leave any foul taste in the spring. As for the holding tank, I pump it as dry as possible, clean it out as much as I can, add an enzyme (KO) "bug eater" (see the "Head Mistress" section) and leave it alone! The bilge I clean out to absolutely dry. Two reasons: It prevents any odors from forming over the winter. It also allows me immediate confirmation that no leaks have developed over the winter when I check the boat (stays in the water all year). Finally, the engine. Really pretty simple. I close the seacock and remove the intake hose. I fill a bucket with a 50% antifreeze solution and stick the hose in. Start the engine and let it run until you see a bit of the antifreeze come out the exhaust. Shut down, reconnect the hose to the seacock, and you are done! Of course, you should change the oil and perform other periodic maintenance before winterizing, but that is the basics. Oh yea, make sure you have ample air flow through the boat over the winter. If not, you will have grown a nice crop of mold spores by the spring! TRUST ME ON THIS ONE!!! Good Luck!Tim L. (former owner of Hunter 31 "TIDE" and currently waiting delivery of a new Catalina 400 - the dealer will winterize this year!)