We have a 1992 Trophy 25 ft with an '01 225 HP Evinrude and an '04 Yamaha 8hp kicker. We owned it about 3 seasons and regularly go salmon fishing in the summer. We have tried all the techniques/tricks (trolling, mooching, downrigger, ect) but we haven't caught one salmon while boats 10 ft away are getting their limit of salmon. We've heard from two different people that an electrical problem could be the cause. What is the best way to test for a problem and how should we go about fixing it?