Capflyer
Well Known Member
I believe my mixture set screw has been slowly backing out most assuredly from vibration. My engine is running richer than it used to. Upon inspection there is no safety wire or anything else holding in place other than a spring the screw goes through. There is no hole in the screw head to mount safety wire. It also turns with ease especially out CCW which richens the mixture. Is this typical? What do others have on the mixture screw if anything to keep them from turning? My carb is a Marvel MA-4SPA.
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