Yamaha WaveRunner FX140 Service Manual page 104

FUEL
FUEL INJECTION SYSTEM
Vacuum pressure at trolling
speed:
Cylinder
Cylinder
difference
–30 ± 10 mmHg
(–4.00 ±
#1
1.33 kPa,
–1.2 ± 0.4 inHg)
#2 Standard*0
0 ± 10 mmHg
(0 ± 1.33 kPa,
#3
0 ± 0.4 inHg)
–20 ± 10 mmHg
(–2.67 ±
#4
1.33 kPa,
–0.8 ± 0.4 inHg)
Standard*: When setting the specified
engine speed, the value is zero.
NOTE:
Always maintain the specified trolling speed
when making this adjustment.
s. Measure the throttle position sensor out-
put voltage. Adjust the throttle position
sensor A position if out of specification.
Throttle position sensor output
voltage:
Pink (P) – Black/Orange (B/O)
0.760 ± 0.016 V
3. Remove:
• Throttle bodies
• Air filter case
4. Remove:
• Carburetor synchronizer or vacuum
gauge
5. Install:
• Plugs
6. Install:
• Air filter case
• Throttle bodies
4-25
E
Example
–210 ± 10 mmHg
(–27.99 ±
1.33 kPa,
–8.3 ± 0.4 inHg)
–180 mmHg
(–23.99 kPa,
–7.1 inHg)
–180 ± 10 mmHg
(–23.99 ±
1.33 kPa,
–7.1 ± 0.4 inHg)
–200 ± 10 mmHg
(–26.66 ±
1.33 kPa,
–7.8 ± 0.4 inHg)