tollycraft
New Member
- Feb 24, 2008
- 281
- Boat Info
- 1988 30Ft Weekender
2004 21 1/2 Weekender
- Engines
- Twin 5.7s Mercruiser Inboards
5 Litre Mercruiser Alpha 1
I installed a second fishfinder in my boat which is networked to my other fishfider. The new one is quite a bit more powerfull at 8000 watts. Problem, when I went out on the water for the first time all was working well untill I shut down one engine to troll and I then lost the bottom readout on both (their networked so that was expected, if one didn't work neither would the other). I returned and put in a separate fuse buss and wired it directly to the battery and now only run the 2 fishfinfers on that fuse buss (which is what I should of done in the first place). Now, I havn't had the chance to go out since but believe the problem is solved. I have three batteries hooked up in series, when I ran only one engine while parked at the dock all worked fine (the fishfinders),but when I checked all three batteries I got different readings. Example, while running the port engine I got 13.5 Volts on one battery, 13.5 Volts on another and 14.5 on the third. Whe I ran the starboard engine only, again I got 13.5 Volts on two batteries and 14.5 on a different battery. Two batteries are new last year and one is new this year. I used a load tester on all three and all are good. I can't understand the one Volt difference. Maybe I'm concerned about nothing here but just can't understand why. Electronics are certainly not my strong point so I'm at a loss. Should I be concerned here or can someone give me an answer.