Same adjustment as toilet bowl floats (you can't really find the lever type anymore, as the fill valves have all gone plastic). The old brass floats are a thing of the past.
Remove - bend arm. Reinstall. Test. Repeat. Repeat.......


Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.