hds-8 keeps rebooting !

Yep, what BB said. Remember, that the must operate voltage of most units (including your unit) is 10 volts. If voltage drops below this level, even momentarily, your unit will reboot or in my case with (Humminbird 997) screen would freeze and I would have to disconnect power from the unit to get it to reboot. Never fixed the problem, even with a new start battery.

I now have a separate battery for all my electronics.

I hooked up my oscilloscope to the battery and saw impulse noises that varied in peak size from from 30 volts to near 0 volts and lasting 10-200 milliseconds. The worst negative swinging impulse voltage was when I started the big engine, and when bilge or circulator pumps turn on.

When I had my john boat I powered a 997 from my motorcycle battery it would last all day. I now have a tracker 175 and its hooked to start bat. but not directly, there is a light on the console that I unhooked to get the power. It does the same thing you are talking about. If I sTART THE BIG MOTOR FIRST then turn on unit it is fine,otherwise it freezes.

Unless you have a full charge on a good battery, starting the big motor will usually cause a reboot, freeze or just flat shut it off. I bought a cheap walmart garden tractor battery for my HDS 8 because of this, but it will not last all day. One day the tractor battery went down early, so I rewired back to the big battery. I've since bought another big battery and use it for the HDS and have used it for a backup to the TM and the Main battery. Never hurts to carry extra juice.

Thanks for all the input guys !! I went one day since my first post and It did it once during the day !! I have since put another battery in the boat just for the freakin graphs ! Next time out when it does it again I will switch out the batts and see if that takes care of it. Will post my results here when I know !

I have a ? For the HDS on the console,wouldnt it be better to hook to the TM batteries instead of the start Bat. When you are running the big motor the trolling motor would be stowed,or it should be. No interference and no rebooting starting engine.

C,mon you electric Gurus,is this good or bad and why. CanePole, Catman ,anyone

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Originally Posted by wilbur

I have a ? For the HDS on the console,wouldnt it be better to hook to the TM batteries instead of the start Bat. When you are running the big motor the trolling motor would be stowed,or it should be. No interference and no rebooting starting engine.

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No. Everytime you step on the TM's go pedal there is a surge to the motor and voltage drops momentary. Electronics do not like surges and voltage drops.

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Originally Posted by Barnacle Bill

No. Everytime you step on the TM's go pedal there is a surge to the motor and voltage drops momentary. Electronics do not like surges and voltage drops.

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Your not running the TM This is console FF

i would run the new units on their own battery and fuse box

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Originally Posted by wilbur

Your not running the TM This is console FF

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In that case you could do it. I always left my console unit on so the person in the back can see the depth.