Have a silly question. Recently got my first boat, besides a row boat. It's a 16.5 Alumacraft with a 9.9 Johnson electric start. It's a 2003, but litterally was only used 5 times, so it's basically new. When I'm running at full speed, my fish locator stops and gives a high voltage alarm. The voltage readout will go from 12/13 to 16+. It's hooked up to the same battery as the motor. If I unhook the motor and use the pull start, no problems. Is there anyway to stop this surge? Any ideas?