We have the "Westerbeke" 12.5 generator, circa 1985. 5,800 hrs on it and still runs perfect. When we got the boat 4 years ago I tore off all the cooling parts, hoses, manifold, intercooler, thermostat housing blah blah. I got my first shock/clue on the costs of parts when I priced just the thermostat and a couple of molded water hoses. And it got a lot worst as it went. I researched on the Inter-Gore and then ordered stuff from Coast Auto---saved me big bucks. I did all of the labor myself which was actually enjoyable, plus it gave me a chance to figure her out. The best part was when she was put all back together with her shiny new coat of Rustoleum Crimson Red.