I have a very nice , clean , tall pressure tank that is empty . When I push on the primer button , which goes up & down with good spring rebound . I do not feel any air pressure coming from the open air or fuel discharge .( I have no hose on tank fittings) does the tank have to have fuel in it in order to prim . I have rebuilt several mid 50 tanks with good success .Any tips on the tall tank would be appreciated .
      Thanks Kevin