I have a 2006 Tiara 3600 Open and had a similar issue this weekend. This boat is one month old for me and have a similar problem to the one posted.
I will try to be as specific as possible to see if I can get a better idea where to start off with my problem.
I went away for the weekend and docked my boat at a friends home who is remodeling his back yard dock and had no shoreline at the moment, during my 3 day stay I planned to turn on the engines every 8-12 hrs. for recharge after the second night my batteries drained as I had left the refrigerator on. I tried starting the boat but the batteries did not have enough juice to crank the engines, unfortunately my Westerbeke gen set is not generating and is scheduled for overhaul next week, so I went to the switch panel and turned the "Emergency Battery Bank Interconnect" switch which as I turned it fell apart in my hand, now the parallel mode was not working as the bronce bridge on the back of the switch was not making contac. Now the boat volt gauges dropped off and the only way to crank it was by pressing the parallel button between both ignition key switches. I connected an external battery charger to both battery banks, I have 3 on stbd. and 2 on port but after an overnight slow charge for both banks the next day I still had to use the booster mode to start the engines. So here I am guessing one or more batteries went bad (I later learned from the previous owner that the AC Delcos where 3 yrs old) After starting the engines and keeping them charging for an hour or so I turned off the Port engine and both shut off, I re started both and now turned off the stbd. engine, Port stays on. I asked the previous owner if he had any alternator issues and said no, he also said he had always ran the boat with the parallel switch on the "on" position. My mechanic said if the switch is on the "on" position and both gauges read a voltage measure you are transferring power from one engine to the other, that will eventually burn one of the alternators. I am assuming that I need an alternator, Batteries and the switch
I just want to make sure and not buy unnecessary parts.
1. Does anyone know what brand and model the emergency switch is?
2. Should I go with AGM batteries?
3. Alternator part number for Cummins 380QSB 12V
I will try to be as specific as possible to see if I can get a better idea where to start off with my problem.
I went away for the weekend and docked my boat at a friends home who is remodeling his back yard dock and had no shoreline at the moment, during my 3 day stay I planned to turn on the engines every 8-12 hrs. for recharge after the second night my batteries drained as I had left the refrigerator on. I tried starting the boat but the batteries did not have enough juice to crank the engines, unfortunately my Westerbeke gen set is not generating and is scheduled for overhaul next week, so I went to the switch panel and turned the "Emergency Battery Bank Interconnect" switch which as I turned it fell apart in my hand, now the parallel mode was not working as the bronce bridge on the back of the switch was not making contac. Now the boat volt gauges dropped off and the only way to crank it was by pressing the parallel button between both ignition key switches. I connected an external battery charger to both battery banks, I have 3 on stbd. and 2 on port but after an overnight slow charge for both banks the next day I still had to use the booster mode to start the engines. So here I am guessing one or more batteries went bad (I later learned from the previous owner that the AC Delcos where 3 yrs old) After starting the engines and keeping them charging for an hour or so I turned off the Port engine and both shut off, I re started both and now turned off the stbd. engine, Port stays on. I asked the previous owner if he had any alternator issues and said no, he also said he had always ran the boat with the parallel switch on the "on" position. My mechanic said if the switch is on the "on" position and both gauges read a voltage measure you are transferring power from one engine to the other, that will eventually burn one of the alternators. I am assuming that I need an alternator, Batteries and the switch
I just want to make sure and not buy unnecessary parts.
1. Does anyone know what brand and model the emergency switch is?
2. Should I go with AGM batteries?
3. Alternator part number for Cummins 380QSB 12V
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