well i'm back home now and the results are:up at full throttle full tank it started ok ,took up rpm at about 10-15 of 30 sec stayed there,then down started ok until sec 3 lost rpm burped then died .i turned the screw with the spring clockwise (i hope i'm doing it ok) all over again up ok ,down burped at about sec 10.now it does not start and fuel goes back quicker .ideas?