lumin

Hi, I have just dug out of my grandpas garage our old husqvarna 50 rancher for a tuneup. New fuel and filter, new spark plug and the saw started up 3rd pull. I did 20 mins of cutting to warm it up before doing a carb adjustment *saw idled fine. Turned both screws on carb full clockwise then turned them both back one full turn (according to manual). The saw now won't idle but runs fine at full open. I can't do carb adjustment without the saw idling first I am not new to chainsaw tech but I would appreciate a nudge in the right direction. Could the carb gasket be leaking air or am I missing something unique to this saw? Additionally the saw oiler releases allot of oil while running is there a flow adjustment screw or is this a pump gasket thing? Thanks in advance. Kind regards Lumin