willysmjeeps.com

My manual on the carb doesn't discuss how to adjust
the idle screw. Mine is a rebuild and I need to make sure
it is adjusted correctly. I assume (dangerous) that you
start from a fully seated screw and adjust it outward some
specified number of turns. Is this correct and if so, how
many turns out? Thanks!

Jim in Darkest Arkansas

I'd measure best mixture via Vacuum gauge.
-start and warm veh to oper temp
-install vacuum gauge and notice reading
-carefully close (clockwise) idle mix screw (do not not jamb !!! or force tight!!"
-let out (counterclockwise) 1/4-1/2 turn and adjust to best vacuum reading.

The standard setting for this carb is 1 1/2 turn out from fully seated. Start there and adjust per manual.

The adjustment procedure is in your M38 manual TM 9-8012 page 151.

Thanks, Wes. Page 151 didn't have the number
of turns of the screw.

Jim in Darkest Arkansas