The needle itself rotates out of position. We’ve only put about 10 hours on the boat since acquiring the motor, so I’d say suddenly. I was testing the boat out with the cover over the jets and choke off, to check for any leaks. The brass barrel and needle fell out once. (Luckily into the boat). I reinstalled and after 20 minutes the needle itself fell out. I reinstalled the needle, took boat for ride with the cover installed, but the jet rotated out of adjustment. It stopped at the rich setting pin.
