evaps, holding plates, and other options
Steve offers some excellent advice as does Gary. However, remember that there are many options available regarding conversion kits now. No longer do we have to pay outrageous prices for cumbersome holding plate systems, when a simple, easily and owner installed 12vdc dx system will serve todays boat owner quite well. If the box is a bit large or "insulation challenged", you may wish to oversize the system a bit. In most cases this is a more economical approach to rebuilding the icebox.Another option is one of the more efficient condenser configurations such as the "keel cooler". Instead of using noisy and inefficient fans or pumps to carry the heat away from the condenser, the heat is dumped outside into the water surrounding the hull. This type of condensor has proven to be far more efficient than air cooled and while it is water cooled in a sense, there is no pump involved, eliminating the extra 1 amp draw (typ). That is a savings of approx. 25%! with a 4-5 amp compressor. It is also a very inexpensive means of refrigerating your icebox. These systems typically run for less than 1000.00. Unfortunately, they are not sold through discount houses, cut rate catalogs or marine "clearing houses". You can only buy direct through the national distributor.