Here are a few more
Empty pressure fresh water system by running water out swim platform hot & cold outlets. Run hot & cold water out of shower, head sink and saloon sink. Replace with pink stuff (non toxic -50 antifreeze) in the fresh water tank until it runs pink out of all faucets (hot & cold). This puts non toxic antifreeze throughout the pressure fresh water system. Empty the holding tank. Add either pink or blue stuff (left over) to the holding tank. This ensures that any residue left in the tank won't freeze and split the tank. Add head lubricant to the head and pump it through so the parts are lubricated. Close both sink through hulls and add pink stuff. Open them briefly, then close them. This puts antifreeze in the through hulls so extremely cold weather won't crack them. I also try to ensure that antifreeze is added to the engine and head through hulls. I use air pressure by mouth, but there probably is a better way. Add pink stuff to the bilge until the bilge pump pumps pink stuff out.Clean the bilge completely. A dry bilge doesn't supply moisture for mildew formulation. Add blue stuff (-100 engine antifreeze) to the raw water strainer while the engine is running until it comes out the exhaust. Make sure the raw water through hull is closed. This puts antifreeze in the raw water section of the engine. I also make sure blue stuff gets into the through hull. Change the engine and transmission oil, add oil stabilizer. Take the raw water impeller out, replace it with a greased up new one. Keep the old one for a spare for next year. Top off the diesel tank. Add fuel stabilizer and fungicide. Run engine for at least 15 minutes. Obviously do this before adding antifreeze to the raw water system. I use a small thermostatic electric heater, but this is controversial. I store my boat wet since my marina has a bubbler system. I also cover the top of the boat with tarps and leave one cowl vent open. This regimen has worked well for me for 4 years now. At first, I took bedding and foam off the boat. Since I never have had a problem with mildew, I no longer do this. I realize this is long, but anywhere water can freeze in a confined area, must be addressed by using antifreeze. I live in Connecticut and went through the worst winter in 100 years with no problems.
