another 12V / 24 V ??

[goose89]

i am swithching out my 55pd minnekota hooked with (2)12V batts (parallel) and going to a 74pd minnekota (24V). both have the universal ("built in") transducer. this is a 2 part ?

1) i've always had my bow mounted depthfinder hooked up to the trolling motor batts (in parallel) up front. never had any probs with my depthfinder. my dad has the exact same set up (55pd 12V - parallel batts) and i've noticed the screen on his bow mount depthfinder changes significantly when I hit the control to make the prop go. (not when the motor is just turning to change directions.) I'd like know what to do with dad's system, so his screen doesn't change w/o having to run it to the starting battery (if possible). any advice welcomed.

2)i'm planning on experimenting with my vex up front this year (also my old garmin 240 if not using the vex.) any worries about hooking them up to the batts up front now that they are hooked up to put out 24Vs?? i've gotten both "nothing to worry about" and "what are you thinking!!?? you'll blow your depthfinder(s) up!" i'm leaving it up to the FM experts. thanks in advance.

goose

[Mark Christianson]

I use my dry cell battery for my bow graph to isolate it from the trolling motor batteries.

Not sure though on what could happen with your questions above.

[Whoaru99]

1. Temporarily connect the depth finder to a battery not hooked up to the trolling motor then try it out. If the problem goes away, maybe try one of those alternator noise filters sometimes used with car stereos; the type that goes on the power leads. Connect the noise filter to the depth finder, not the trolling motor.

If the problem does not go away then I'm not sure what to try next. By any chance, does the transducer cable run parallel to the trolling motor power wires for any significant distance?

2. I believe that if you connect the depthfinder to the + and - terminals of one battery, you will be fine even though the batteries are in series for 24 volts. The key is to connect to the terminals of just one battery to get 12 volts.

[goose89]

thanks whoaru99.

later,

goose