There’s another adjustment screw on my carburetor, a little bit to the left of the idle adjust screw, a little bit beneath it, pointed more upward, not-seeable when the air cleaner is mounted. It’s the 22 R engine. The Chilton’s diagrams of the 8, 18, and 20 engines have ‘fast idle adjusting’, ‘m…

What's this other adjustment screw on my carburetor?

the_same_mountainbike February 2, 2017, 10:45pm 2

Can you post a photo? I’ve had a lot of experience with 22Rs, but cannot envision your description.

Can I install a tachometer?

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