Ok making some progress. Put carb back on after a second cleaning, this time i removed the idle mixture screw, it was really dirty. Put in back in all the way, then backed off 1 1/2 turns, it finally started up and ran longer than normal but then died. It will run for a couple minutes with 3/4 choke then stall. Did i back off the idle screw too far or too little? Where is the sweet spot?