My 150 intruder is running well, but when I push the throttle forward fast an alarm beeps momentairly it only does this sometimes though. And if the move the throttle forward slowly it does not sound. The last owner said it has done it for years. Any idea what it could be or why it does this? Motor seems to be running great and I just had a new stator put in and check out by a evinrude tech. Just curious