Ok then these are the low and high speed adjusting screws. first make sure the spark plug is clean of buildup or new . what you need to do is first try to get it to idle with the low adj screw. now im not sure which ones which so try one and if it makes no difference during idle then try the other. start it if it dies turn the screw , repeat this until you get the right sound and steady idle.once you figure out the low screw trun it all the way clockwise then turn it counter about 2 turns. then tune the idle from here. you want it to have a steady sounding idle. now the idle sounds good use the high screw to adjust the throttle. give it about half throttle and turn the high screw until it sounds steady here. then go to full throttle and turn high screw until it sounds steady here. now it should sound steady at idle and throttle. and try not to trun the screws more than 1/8 to 1/4 turn at a time,especially the high, you dont want to blow it up. lemme know how it goes