Have a 2000 310 and am having problems with the electrical/battery. I believe a problem is the battery breaker that is located on the battery selector switch. It is a 50A push button type. It appears to be sticking so it will be a unreliable in the sense that you don't know if it is open or closed (or somewhere in between). When I look at websites such as West Marine or Hamilton Marine, I do not find any breaker that is similar in the way it mounts onto the switch plate. The existing breaker mounts on the back side of the switch plate with 2 securing screws and the push buttom comes through a hole in the plate so you can just push the button to open or reset the circuit. As I said there is nothing that is remotely close to the look and mounting of the existing breaker. The bilge pump 25A breaker is also the same type and is mounted on the switch plate as well. Is there anywhere to purchase the same type of breaker or do I have to buy something else and mount it with a bit of engineering involved?KenK