Ok so last week I posted up about a charging problem my brother 455 had. Well after searching this site we found all the correct wiring diagrams went had the alternator tested found out it was bad. Well we bought a new one and found that the shop had wired the alternator into itself by passing the battery all together. After abut 3 hours of re-wiring the boat my brother took to buena vista had zero charging problems yesterday said it's running great outside of a few minor adjustments to the carb/ timing. However he said today he took it out and the volts started to fall again and the battery went dead. Mind you prior to us re-wiring it the volts never went above 10 volts. After we re-wired it and changed the alternator the volts jumped up to 12 volts. Could the brand new alternator have gone bad? any suggestions? and Ideas??