Chain keeps loosing up on my stihl ms250c.

[Brushwacker]

Just saying, I have been using saws near 50 years and the few saws i had with those adjusters I don't remember a significant problem keeping them working satisfactory. I don't doubt the standard adjuster is a stouter more reliable set up and at a point necessary for longer and heavier bar and chains but on the other hand the toolless is often handy on the smaller saws, at least the ones using picco bars and chains. I don't recollect using the toolless set up with bigger then 16inch. 325 which i don't recollect a problem other then I believe a small screw backing out of 1 , likely wasn't tight in the first place.
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[psc1947]

Looking forward to knowing what you found--and results.

 

[Stihl Learning]

Are you lifting up the tip of the bar when you tighten down the wing nut? I have used many of these with no issues.

 

[stihltech]

One person hates quick adjust, the other asks if I can put it on their saw. Has not been an issue at this shop. Lift bar nose when tightening, make sure all slack is out. Dull chain and lack of oil are the usual culprits.