Battery switches

[mark leggo]

I recently purchase a 1996 290 sundancer and are confused with the battery switches and there functions. The boat is equipped with twin 4.3 liter engines. I have one battery switch on the left that simply has an on and off position and a battery switch on the right that has a 1 postion, all position and 2 position. The boat is eqipped with 2 cranking batteries and one deep cycle. My problem is that when the battery is set to position 2, one motor will start and one acts as if the battery is dead??, if I put it on 1 or all, both motors fire up fine. It would appear one of the batteries is dead put I do not understand why one motor would start on position 2 but the other does not. Could someone provide information on the configuration of the switches so that I can understand there functions?

 

[Carpedmman]

Welcome to Sea Ray ownership! If I'm understanding your question correctly: Switch #1 will turn one battery on to start the Port or Starboard engine only. This is a direct connection to the one engine that it is connected to and start that engine. Switch # 2 will start the other engine, or if you have it on "all" it will bridge the batteries together so that you charge all at the same time with the alternator of the engines. "All" ties all the batteries together. This is merely a thought process as I personally never use those switches as they are hard to get at on my boat.

Hope this helps!

 

[SeaSparks]

I would be willing to bet that somone switched the #2 battery and common posts on the back of the switch.

 

[emasloski]

I have a 95 270 sundancer with twin v-6 4.3L engines too. I am confused with the battery configuration. I have 2 deep cycle and one cranking battery. Were you able to find out the configuration for the 3 batteries?

 

[GrandMaster]

Have the same set-up as original poster. The on/off battery switch is for the port engine start battery and must be on to start the port engine.

The 1-2-Both switch is for the stb side as the house battery and stb starter battery are on that side. To start both engines you need to have the both the port (left) and stb (right) switches on

 

[mcyvas]

twin engines, 5 batteries. 3 switches. 2 sets of 2 batteries tied together (positives are connected, neg are connected). 1 battery has own neg and positive leads.
1 set also has neg lead going to the 1 switch which has 1,2,both choice. the single battery also has positive lead to same switch above. From this switch, a positive and neg lead leaves and heads above the engine compartment, to 2 switches with on,off starbd and on,off port.

can someone explain to me how this is to be operated during operation. at dock, on water and under generator power ??