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Posting a reply to: Re: Electronics die when I start boat

Muskie Fishing -> Muskie Boats and Motors

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Captain

Posted 9/17/2015 3:11 PM (#784887 - in reply to #784885)
Subject: Re: Electronics die when I start boat

Posts: 437

Your HDS units are obviously being powered by the cranking battery. When you try and start your motor the amperage drops which HDS units are sensitive to that to protect themselves so they turn off.
How to resolve? Cheapest -- run a dedicated red and black wire all the way back to the battery instead of using the "factory" wiring at the mounting location. This sometimes cures the problem, but not always.
Install larger battery would be the next best, but be sure to replace with a "dual purpose" and not a "cranking" or starting battery.
Best alternative would be to have a dedicated battery just for electronics. This way you should never have to worry about draining it down too much and not have your outboard start. In this scenario you will have to figure out a way to charge the additional battery either by using the outboard's alternator capacity as well as an onboard charger with an additional bank.