It's amazing that people will spend tens-if not hundreds-of thousands of dollars on a boat and then nickel-and-dime the maintenance. Because a boat's systems are often exposed to harsh elements, the more you boat, the more maintenance it needs. That's why it's so tempting to find some inexpensive parts to fill in the gaps. But when you're dealing with mechanical and electrical systems, get the good stuff. When replacing wiring, use high-grade tinned-copper wire. For diesel engines, use high-pressure braided hoses; for gas engines, use A1 rubber hoses. Double clamp everything with stainless-steel clamps. Use stainless-steel or chromed-bronze fittings. (Some of the new plastic fittings work just as well, too.) And above all else, stay out of the auto parts store.