Hello I recently purchased a lund with a mariner 40 magnum electric start with controls. It had sat for 8 years so I rebuilt the carbs and got the motor going in the driveway. At home with the motor running I noticed that it didn't seem like the rectifier was charging ordered a new one but isn't in yet. Took the boat to the harbor to try it out. Fired right up but couldnthe get it to idle down adjusted carbs and throttle then it wouldn't start for a while didn't seem like a fuel/carb issue but kept messing with adjustments....then after more fussing around it fired up. Ran it out of the harbor and ran around for 20 mins, ran great. Shut it off and on a few times, no issues. Then decided to pull start it, it fired up first pull with key on then I turned the key off to kill tho motor. Long story less long haven't been able to get it to start and there is no spark. What could cause a sudden or intermittent loss of spark. Tried disconnecting kill switch a tilt swith still nothing. Disconnected controls and jumped starter and nothing. Time to check stator, switch box,....etc. anyone have any ideas. Could the stator and switch box be intermittent and then just die or would they just die?