I just got the screwdriver needed to tune my BG 86 handheld blower, It was 1 turn out too rich on the H from the get-go, and it was a mess at the muffler. Annoying, you can't just use a flat blade. Runs nice now!You can’t out tune a lack of load or a limited ignition coil. If the hedge trimmer hits the ignition limiter constantly because you’ve leaned it out, I don’t care what you do with the screws, it’s making spooge Edit: hedge trimmers are the worst. Line trimmers and blowers aren’t so bad as they see more load, but still don’t burn as clean as a saw, just like lonewolf said. They’ll burn better if you lean them out. However when you get into a lot of thick grass they should be retuned to suite the extra load like you would changing bar lengths.
And a lot of times with the Trimmers you can't run them wide open because rocks and windows!