Need help fast! I've got a 2001 Rinker Captiva 212 with a 2001 GM 305 5.0L 2bbl Mercruiser. Whenever I am cruising or pulling a tube at around 20 knots, I loose all electrical power, the engine quits, sputters a few seconds and goes dead. After 10-15 secs the electrics come back on line and I...