[roboh20]

There is no maintenance required that I am aware of on most Fireboy systems and if the green light is on it is most likely charged.  However it is a good idea to have a fire protection company regularly check and tag the system. My insurance company requires that my automatic fire suppression system be "in good working order" so each spring I have a company check and tag the fixed and handheld devices. if you can get several boat owners to do it at the same time the price should be reasonable. For me the $75.00 is well spent knowing all my extinguishers are ready to go and if the worse should happen I have documentation that the fixed system was inspected. 

Hope that helps

Thanks for the responses, question for Capt. George. Wouldn't you rather let an automatic fire suppression system fight a fire in the engine compartment? Chances are the system would know there is a problem before the crew. Plus opening the hatch would add more oxygen to the fire. As noted, the gauge on the unit and the green light is on but I would rather be sure its ready to go if needed. Also does the Coast Guard require it be inspected? Thanks