Suzuki F6A Service Manual page 93

NOTE:
Should indicating hand of the vacuum gauge oscil-
late violently, turn adjusting nut (A) to steady it.
40–48 cmHg
Standard vacuum
(15.8–18.8 in.Hg) at
(Sea level)
specified idling speed.
4) After checking, remove vacuum gauge.
5) Before reinstalling vacuum checking switch, be sure
to wrap its screw threads with sealing tape and tighten
switch.
91