I have changed fuel filter,lines,air filter plug and yet my 028 will not run, it tries running for like 2 seconds then dies and seems like its getting fuel, the H and L screws have been adjusted and I believe the person didn't know what they were doing!! What is the H and L screw settings for an 028 wood boss super?? And does anyone have and idea why won't start??

Both set at 1 - 1 1/4
Sounds like something in carb , probably needs kit installed . Luck