One method
Stuart, I have 2 A/C units and I have winterized them for 3 years. I have developed a method that seems to work easily and effectively for me. My method works equally well for boats that are in or out of the water for the winter. Basically, you need to keep water from freezing in the lines, pump, and A/C heat exchanger. For my fresh water system, I simply blow the lines and pump clear with air and leave them dry. For my engine, generator, and the A/C units I feel it is better to fill the systems with the enviromentally friendly antifreeze. I do this for two reasons- first to be absolutely sure of eliminating all pockets of water that might freeze and second to provide internal corrosion protection to the metal parts and eliminate internal rusting. For all the engines and A/C system, I simply flush the systems with fresh water to disolve any salt and then allow the systems to suck in an antifreeze mixture until it is discharged. Check out my photo posting by searching in the Hunter photo forum for "Improved Winterizing Engine". Rich
