Joe, I have a 95 Pantera II and just replaced my starting battery.I have the old electronic dash, but it still works fine. When I changed out my starting battery, I had to remove it for a period of a couple days. I didnt lose the engine hours. (Dont know about any other engine history related features).One tip though, I would take pictures or label the wires that go to each terminal. This way hooking it back up when youre in the driveway or on the water is stress free. Dont know anything about jumping a starting batt off of the trolling batts. Im all ears though….