Jump to content

New Battery Help


Recommended Posts

On my new to me Pathfinder I am still learning the wiring layout. Boat has four batteries and one Prosport three bank charger. 

I have two West Marine Dual Purpose group 27 batteries in the console. I am pretty sure these are isolated to run the trolling motor only. Each battery is hooked to a charging bank on the prosports

In the transom I have two Interstate group 27 cranking batteries. These are hooked up to the Perko selector switch. Switching being a 1, both, 2, off. One of the batteries has leads coming from the third bank on the prosports charger. I am pretty sure it is rigged so that one battery is the cranking and the second is the house battery. 

Here lies my questions:

I am replacing the two Interstate batteries. I am looking at going with the same batteries as in the console. Will these dual purpose batteries be a better fit? I also want to make sure this battery is a good fit for my 2010 Yamaha F150. Batteries: http://www.westmarine.com/buy/west-m...91?recordNum=7 The reverse capacity on the battery is lower than what the Yamaha manual says....

Or, am I better off going back to two regular cranking batteries?

My thought is going with the dual purpose allows my electronics to benefit from them being deep cycle and I can still use either one to crank the motor? Electronics remain on when I am either stopped fishing, diving or at the sandbar. The electronics are minimal though. Garmin 94sv, radio, lights.

Link to comment
Share on other sites

I think this might be a good time to go to a three battery setup.  I would suggest you put three group 27 or 31 deep cycle in the console.  This reduction in weight in the stern will help your boat perform better.  

Two batteries run your trolling motor, the third battery is your cranking battery and wire it so one if your trolling motor batteries is the backup for your cranking battery.

Look around the forum, Hobo published a wiring diagram for this setup.




Link to comment
Share on other sites

I have mine set up this way as well. AGM is definitely the way to go. 

Check out the 27 series Duracell at SAMs Club. Great price. 


Brew - it wouldn't be advisable to run that set up with 3 batteries because as you wear down the one battery that is being shared with the "house", it will begin to canabalize the others. 

Link to comment
Share on other sites


This topic is now archived and is closed to further replies.

  • Create New...