My '72 Evinrude 50, 2 cyl w/ electronic ignition sometimes won't start when cold. It has no spark. Eventually, it gets spark and will fire. Once it does start, it runs great and will restart every time until it gets cold again, then may or may not start. I can't find anything wrong. I recently found out that if I jump the white sensor wire at the power pack to ground, it will start every time. Once it starts, I can disconnect the ground and it runs fine. Any idea what this could be?
