Normally it's just a small/jeweler's screwdriver. From the doc Rivets posted clockwise leaner, counter richer. Normally clockwise will hit a dead stop. It's a good idea to note where the setting is. Turn clockwise to stop, note how many turns, use that as starting point. I didn't see a recommended start point in the doc. I would remove and clean the needles as doc advises, and blow out with carb cleaner before putting them back in. The longer needle is the Low. Sometimes there are limiters on the screws, so you can't easily remove them, or adjust beyond a certain range.
TB90BC Bushcutter-Help
- Thread starter Boyde
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