I have a 1982 18 hp Merc , Just bought this one and was trying to get it started and notices gas dripping and found a plastic screw in the bottom front of carb , thought it was a plug to drain , but looks more then that, i got the rest of it out and it has a hole in the end of it, a o-ring about hafe way up the screw and to square holes in the side of screw , I did do a search but no luck , have not had no luck finding this screw. any info or help would be great . Thanks
