Good evening everyone, Was doing the first oil change after 50hrs on my 1969 Arrow 200 (IO360 C1C). I unscrewed the gold cap of the drain plug and pushed up on the inner cylinder to let the oil drain. All was fine and the oil came out, however once I went to let the plug down it just won't come down, see the pics to see the position it was in before draining after cap removal (all the day down) and while it was draining (about half up). I've tried a flathead and allen wrench to push it up and it goes up, and tried to twist it but it just won't come back down from that half up position. Obviously I can't put the new oil in until that cylinder comes back down. Any advice?