My brother has a 2012 Optimax 250ProXS out of warranty that is giving an engine alarm and showing low voltage. Took it to the dealer and they charged $300 and said it was the battery. We have replaced the battery with a new battery but it is still doing the same thing. Contacted the dealer and they said to bring it back in and they will look at it again. Another $300 I pressume. We noticed that when the motor is running the voltage on the smart craft guage is going down instead of up, which makes us think it is running off the battery and not getting a charge from the alternator. Voltage at the beginning of the day starts around 12.7 volts and continually drops all day until it gets around 11volts then the alarm comes on. The more or faster you run, the quicker the voltage drops. I have a 2014 Optimax and when my motor is running the battery voltage jumps from 12.7V up to 13.6 volts. We have eliminated the battery as the problem and think the issue is either the alternator or wiring/fuse between alternator and battery. Saw a posting on another forum about similar issue where problem was determined to be a "fuseable link between the alternator and battery". Anyone know where this fuse would be and what size it should be. We are not mechanics but we can replace a fuse if we can find. Thanks!!!