Took my boat out this past Saturday (Maxum 1800SR, Mercruiser 3.0l) and it as running great. Spent a few hours spinning around and stopped several times so the kids could swim. Had no problems restarting while on the water.
After a few hours it was time to pack it in and we went back to the dock and shut down. After backing the trailer in, went to start the boat and got nothing. I had lost all electrical power.
Spent Sunday diagnosing and found that I had blown the 90 amp fuse between the battery cable on the starter and the rest of the electrical system. I got out my meter and started testing and found that I had a dead short from that fuse out to the electrical system. Eventually traced it back to the alternator. I disconnected it and sure enough, the short was gone.
Sent alternator to the shop that rebuilds them and got a call from them that the rectifier was fried. So here is the question...
What could have happened that could have so violently taken out the rectifier on the alternator. I have made no modifications to the boat cosmetically, mechanically or electrically and I have it professionally serviced every season. I am worried that I am going to put the new alternator in and the same thing is going to happen. I have had zero issues with this boat in 7 years.
After a few hours it was time to pack it in and we went back to the dock and shut down. After backing the trailer in, went to start the boat and got nothing. I had lost all electrical power.
Spent Sunday diagnosing and found that I had blown the 90 amp fuse between the battery cable on the starter and the rest of the electrical system. I got out my meter and started testing and found that I had a dead short from that fuse out to the electrical system. Eventually traced it back to the alternator. I disconnected it and sure enough, the short was gone.
Sent alternator to the shop that rebuilds them and got a call from them that the rectifier was fried. So here is the question...
What could have happened that could have so violently taken out the rectifier on the alternator. I have made no modifications to the boat cosmetically, mechanically or electrically and I have it professionally serviced every season. I am worried that I am going to put the new alternator in and the same thing is going to happen. I have had zero issues with this boat in 7 years.
