I've got an HMF full system with lid on at 900 ft. I used the JD Jet kit with a 170 main, 45 pilot, blue needle in third postion, and fuel screw at 2 1/4 turns. Everything seems to be perfect except if its idling for about a minute it wants to stall or if you stall it and try to restart it doesn't want to start without giving it gas. Do i need to play with the fuel screw or is it something else?