MBeige, is it idleing rough at 700rpm? Stalling at stand? 800rpm is where I have mine cause I run the A/C a lot, but 700rpm should be fine? I guess 700rpm would use less fuel, too, but The OM617 uses very little fuel when just idleing, I have read elsewhere. Fiddle with that adjustment screw some more, I think CCW raised idle, doesn't it?

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PagodaLOVER
1967 230SL, manual
1959 180D, manual