Running 2 Hummingbird Units

[Lipriper84]

I'm in the process of upgrading my electronics. I'm going to be getting the 1187 for the counsel and probably an 8 or 9 series for the bow. My questions is do you power these with your Cranking Battery, or can you hook them up to your 24volt system for the Trolling motor. Or would I be better of getting a seperate deep cycle specifically for the Depthfinders.

Also Can I use just 1 transducer and run both units off of it? What would be the best way to hook them up if I need 2? One on the Trolling motor and one on the Back, Or both running to the back?

Also I have a older 16ft YarCraft and I'm using a Cable Driven 74lb Maxxus Trolling motor.

Thanks for any input.

[TruthWalleyes]

you could run it off of 1 of your tm batteries. 12v only.

if you run it off your cranking batt then you can monitor your voltage.

i would use separate transducers , one in back and 1 on tm.

you can set them up to share a ducer with a connection box.

there is also a switch avaolable to run 2 ducers to 1 head.

[Brad B]

it is not advised to run a fish finder off a trolling motor battery. when the motor is running it will cause electrical interference on the finder. this is what my dealer told me when I bought my boat. I was going to do this at first but after hearing that I decided to add a stand alone battery in the back and run my finders and radio and VHF radio off that instead.

[Lipriper84]

Thanks for the info Brad and Truth. That's good info about the interference.

Any Idea how long you can run 2 bigger screens on one battery? I would imagine they would run all day no problem, just no experience with the bigger more powerful units.

Thanks again,

[TyGuy02]

I agree with the interference with a shared battery. I added my VX-1 to a trolling motor last year and opted to add a battery due to noise when the motor would surge. Maybe it wouldn't be an issue with that sonar, but I don't know

[harvey lee]

I run both my Bird units off a tm battery. One unit goes to the tm and the other on my dash. One ducer for the dash unit on the back of the boat ands the other through my tm.

I have had zero issues running it this way.

[Lipriper84]

Hey Harvey,

What Hummingbird units are you running?

Thanks for the info,

[harvey lee]

I have a 798 on the front of the boat and a 998 on the counsel.

Both are side imaging units. I also run 2 recievers for the GPS. I could not get the part to hook them to one puck so I just installed both of them. Was going to switch to one puck for both GPS units but they work fine the way they are installed now.

Been very happy with both of these units. Not one issue to date. I do lose my signal on the dash unit when I get up to about 25mph but it does not concern me that much or I would have readjusted it.

[Lipriper84]

Thanks

[TruthWalleyes]

Interference all depends on how you run your wires. not just from sharing apower source.

i have 3 batts in parallel running 10 switches including my graph and additionally two trolling motors and no interference.

just dont run other positive wires next to your graph wires.