Hey guys ,Had pro bebuild my carbs and now i cant it to start on its own if i pull the lugs and pour some fuel it starts and after a few times it will pull from the tank .Whats the issue here ,also have pulled reeds and resealed them thought i had it figured out but it turns out that after about 20 mins it wont start again ,just cranks, compression in good .Is there something in the tank that holds prime .When i say prime thats what it seems to me to be the issue like it leaks down .I also trying a primer bulb to see if it would start that way but no luck.