Saw idles great but as soon as I stop throttle in log it stalls

The wife bought me a Wild Thing for Christmas at my asking. Went to use it on Saturday and it would not run for squat...I had to make my own Carb adjusting tool because they have changed the idle mixture screws to make it more painful to do...backout the L for Low Idle screw about 1/4 of a turn. Once you get it to idle and can actually slow the idle down enough so it runs correctly you can then fine tune the mixture at an idle. Then full throttle it and see if it runs ok there. If it does, your ready to go..If not, back it out, counterclockwise 1/8 to a 1/4 of a turn and see how well it runs. Basically from what I can tell, they did a really bad job of setting the carb at the factory!