I just bought a 1998 Force on a 20' Fisher Deck Boat. It ran great when we tested the boat. When we took it out for the first time I noticed a minor skip now that we have used the boat a few times it has turned into a major cutting out when it cuts out the guages flicker and dim almost go out at times. The last time we used the boat the entire electrical system went down. It had on response at all to turning the key. After an hour of using the trolling motor trying to get back to the ramp I took the motor cover off to check for loose connections. When I took the cover off we tried one more time and it cranked. I did not touch anything. It has been doing that since. When it goes dead I can jump out he starter relay it will start and work until the next time. The gauges still act up and it still runs rough. Where do I start. I plan on taking it to a boat shop but I would like to be informed about the possibilities. Thanks