welded troller block to the bow of my boat. I wanted to have a 2nd power source to pick up decoys in deeper water and fish. I purchased a humminbird down schan imager to mount to the troller. Have any of you ran your sonar and trolling motor off the same 12V battery? The toller is only a 40lb thrust so its not drawing a lot of amps. Also how did you attach your sonar to the 12v terminals? the sonar has small diameter wires and I do not think crimps will work too well.

I just installed a Helix 7 and the manual said to run it of the battery for your big motor and not the trolling motor battery.

I run my TM off the same battery as my depth finder. Wanna be a able to get home. If the tm battery dies it's time to go

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Run your sonar off cranking battery. The trolling motor will interfere with the sonar if it is on the same battery. I think my cranking battery is a group 24 and runs my helix 5 all day no problem. That's sometimes with my stereo going too. My 2 trolling batteries are group 29.


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