Quote:
Originally Posted by MaSnaka
Sledge,
The screws have an interference fit...Someone on the FE forum mentioned they are peened (not sure what that means). I assume so they don't vibrate loose and get sucked in and processed through the combustion magic. Only loosen maybe 1/4 turn, set idle adjustment as low as it will go. Tighten and readjust the idle position screw. I was getting a weird hang up with the engine running, but with the engine off no hang up. Maybe vacuum was pulling the butterfly plates closed where the friction occurred. I hope it helps you.
John
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'Peened' in this context means the protruding threaded end of the machine screw is hammered into a bit of a mushroom shape against the throttle shaft so it physically prevents the screw from loosening.