62Y3A11
4-24
1
2
3
4
5
6
7
8
I
5. Measure the vacuum pressure of carbu-
retor #4.
6. Turn the throttle valve adjusting screws
5
to adjust the vacuum pressure of car-
buretors #1, #2, and #3 to the same vac-
uum variation as carburetor #4.
7. Adjust the engine idle speed to specifica-
tion.
8. After adjusting the idle speed, rev the
engine a few times and let it idle for at
least 15 seconds to check that the vac-
uum pressures stay within 50 mm Hg
(67 m bar, 1.97 in Hg) and to check the
stability of the engine.
Adjusting the dash-pot
(acceleration pump)
1. Start the engine and warm it up for 5 min-
utes, and then check the engine speed at
the operation point of the dash-pot.
2. Attach the special service tool to high-
tension cord #1
1
.
3. Open the throttle cam
2
slowly, and
check the engine speed when the accel-
eration pump stopper
3
comes into con-
tact with point
a
.
4. If out of specification, adjust the engine
speed at the operation point of dash-pot.
Engine idle speed:
750
±
50 (950
±
50) r/min
Inductive self-powered tachometer:
YU-08036-B
Digital tachometer: 90890-06760
Engine speed: 2,700 r/min
S62Y4430
1
Carburetor
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