I recently purchased an 89 Sunsport and often the engine won't start when I turn the key and I have to work the throttle back and forth and back into the neutral position, sometimes several times, until the engine will turn over. It seems that whatever detects the neutral position doesn't always recognize that the boat is in neutral. It can happen first time I go out, or after starting and stopping the engine multiple times during the day without previous issue. Can someone tell me where to look and what to check for?