Idle adust knob sticking/hard to turn.

[Argon0639]

So recently my idle adjustment has become very hard to turn...very!   Any suggestions to rectify this?

[Pete]

A little liquid wrench should help, if it is water, soap, dirt, rust residue causing the issue.

[Thunderbolt]

if you are attempting to increase engine speed.  It could need lubrication also.

[valk2128]

Had this same kind of problem awhile ago, wound up the adjustment screw inside the knob was bent.  Replaced it and no more problems.

[joefromperry]

Same problem here last year, and we found the screw inside the throttle adjustment knob was bent. Took it apart and replaced it; all is fine now.