I haven't had one of these apart yet so not sure what bulb is used. Have you looked close at the bulb to see it it's the filament, or is it that the contact is melted? If filment, check voltage at socket, see what it is. If over 13 plus volts, contact the dealer. Nothing you can do unless you are skillful and want to add a resistor. If melted, make sure socket is dead ( no current) and pull slightly up on the contacts. Add die-electric grease to the socket and install a new bulb. You may want to try a different brand of bulb. If your boat is new, make sure you report this to the dealer. These issues are rarely one-of. This way Bennington can be seeing this in there warranty claims and contact thier supplier to fix it.
AWK