Yamaha F115A - Page 90

3-9
E
INSP
ADJ
CONTROL SYSTEM
(5) Check the vacuum pressure of all cylin-
ders.
(6) Turn the synchronizing screw 4 so the
vacuum pressure of cylinder #3 or #4
is within 30 mmHg (40 mbar, 1.18
inHg) based of the vacuum pressure of
cylinder #1 or #2.
Tighten Vacuum pressure increases.
Loosen Vacuum pressure decreases.
General adjusting tool
Torx T-25 (with a concave in the center)
Example 1:
Check results:
360 mmHg
(480 mbar,
14.2 inHg)
Adjust the differ-
ence of the vac-
uum pressure
between cylin-
ders #1 and #4
within 30 mmHg
(40 mbar, 1.18
inHg).
Cylinder #2 350 mmHg
(467 mbar,
13.8 inHg)
Cylinder #3 310 mmHg
(413 mbar,
12.2 inHg)
300 mmHg
(400 mbar,
11.8 inHg)
Example 2:
Check results:
Cylinder #1 360 mmHg
(480 mbar,
14.2 inHg)
Adjust the differ-
ence of the vac-
uum pressure
between cylin-
ders #2 and #4
within 30 mmHg
(40 mbar, 1.18
inHg).
350 mmHg
(467 mbar,
13.8 inHg)
Cylinder #3 390 mmHg
(520 mbar,
15.4 inHg)
400 mmHg
(533 mbar,
15.8 inHg)
Cylinder #1
Cylinder #4
Cylinder #2
Cylinder #4