Replacing a generator is far more common than replacing engines. I've seen many boats with twice as many hours on the gen set than the engine(s). After all, once you arrive at your destination, you want all the comforts like air conditioning, the refrigerator, and the ice maker to keep humming along.

While the CO produced by a gas-fueled propulsion engine is of concern, the motion of the boat aides significantly in dis-persing the exhaust,diluting the CO content of the air on the boat to generally acceptable levels.Exceptions to safed ispersal occur most often when the engines are left idling for long periods of time to charge batteries or if the stationwagon effect (negative pressure area behind a moving boat) draws the exhaust into the cockpit or into an interior compartment.In most cases,though,the great-est risk from CO poisoning comes from running theboat&#