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Old 03-24-2015, 02:38 AM   #11
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I just bought a 2004 3300 and took the cabinet apart to try and figure out the same issue. On mine the hot lead from each battery goes to the 1 terminal on the switches. There is a short jumper cable that connects the two 2 terminals on the switches. The house connections are on the starboard switch. Thus I decided to leave both switches on 1 so each engine goes to a separate battery and the port battery would not be drained by the house load. This way I will always have the port battery for starting and if the starboard/house battery goes dead I could switch both switches to both and start both batteries. It seems as if it would have made more sense to do it as the manual says but it looks like they changed it for some reason

Hope this helps
Rich
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Old 03-24-2015, 07:13 PM   #12
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Quote:
Originally Posted by RandR View Post
I just bought a 2004 3300 and took the cabinet apart to try and figure out the same issue. On mine the hot lead from each battery goes to the 1 terminal on the switches. There is a short jumper cable that connects the two 2 terminals on the switches. The house connections are on the starboard switch. Thus I decided to leave both switches on 1 so each engine goes to a separate battery and the port battery would not be drained by the house load. This way I will always have the port battery for starting and if the starboard/house battery goes dead I could switch both switches to both and start both batteries. It seems as if it would have made more sense to do it as the manual says but it looks like they changed it for some reason

Hope this helps
Rich
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Wow.... This just doesn't make sense why they did it this way..... I'm sure your right, as these diagrams in a owners manual I found online illustrates the exact same thing...... It seems as though the running lights and others systems like bilge pumps, stereo system etc are on the port switch/battery and the House systems are on the starboard switch/battery, my questions are two fold, 1) shouldn't the stereo system also be on with the "House" systems, that way if your on the hook listening to your stereo and you have your House lights on, you are only feeding/killing one battery? 2) What do the #2 positions on the battery switches do and how/when should they be used?

Here is how my mind is figuring it.... Maybe someone here could tell me if I'm right or wrong, Being as the #2 switches don't have a separate battery attached to them, and they are just tied/jumpered together, that would mean that it's only use would be to tie the two sides together? So for instance in the example above, if I wanted to run my stereo and not kill my port battery I would have to have the starboard switch set to [Both? >>>Because "Both" doesn't mean both batteries, it means "Both Circuits"], and the Port switch set #2?
In my mind this is what that should do.... With the starboard switch to " BOTH", It allows the current from that battery [Stbd] to flow thru to the #2 side, when you place the port switch into the #2 position it then connects anything that is connected to the port switch directly to the starboard battery. So to get everything to run off the port battery you would do the same and put it in Both and the Stbd switch to the #2 position.

So is this thinking correct? Does it make sense to anyone else?
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Old 03-24-2015, 07:17 PM   #13
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LOL....I have no idea why it posted my Kid Rock ticket purchase confirmation but it won't let me take it out.... Lol
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Old 03-24-2015, 07:21 PM   #14
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It was supposed to be posting these schematics....
uploadfromtaptalk1427224870871.png
uploadfromtaptalk1427224884997.png
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Old 03-25-2015, 01:49 AM   #15
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I can check more into my 3300 this weekend, as I recall from last year, all the house load including the stereo was on the same battery. I think it was the Starboard engine battery. The other battery was purely for starting, thus with both swithches in the 1 position the house load would only drain the starboard battery, if it went dead, i could switch the port battery to 'both' and the starboard to 2 to start it off the port battery. 0GRAVITY I do agree with yor thinking above, however a simpler idea would be to pull the panel in the storage locker and move your sterio lead to the same terminal as all the other house loads. note to pull that panel i had to cut a bunch of wire tires in the engine compartment above the battery charger to get enough slack in the lines. even with that it was tight working.
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Old 03-25-2015, 03:11 AM   #16
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RandR, thanks again for checking yours out, and please do let me know what you come up with when you check yours out. I have already thought about switching my stereo power over to the other side.... That being said if I can just switch one battery to Both and the other to 2 to get everything to run off one battery while I'm on the hook, then I will probably just get myself into that habit anyway in order to isolate one battery for starting purposes.
I will also be at my body Sunday so I will be able to verify if my beliefs are correct.
Thanks again,
Mike
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Old 03-25-2015, 03:37 AM   #17
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As for Rips original question, if yours is like we have been discussing above, you would need Two All purpose deep cycle batteries because in normal operation both batteries are used for starting purposes and various other functions.
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Old 03-25-2015, 04:02 AM   #18
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Here are some real simplified schematics I made up to illustrate how I am thinking it works with the setup I have, I will be verifying this soon!
uploadfromtaptalk1427256037024.png
uploadfromtaptalk1427256069321.png
uploadfromtaptalk1427256095820.png
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Old 04-07-2015, 02:18 AM   #19
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Finally got down to my boat and hooked up the batteries. I can confirm that all the house loads including the sterile are on the starboard battery. The port is purely starting for the port engine. So if I leave both switches on one. Even if the starboard is run down by house load I should still have the port for starting
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Old 05-10-2015, 03:27 PM   #20
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I also have a 2001 SCR3000. It has two batteries and the same thing, the two battery switches have to be in the "both" position. Maxum from the factory did not wire the battery switch configuration correctly to separate the "house" from the engines. If I do pull the switch panel this year, I will post what I find.
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