69W3D1X
44
Adjusting the dashpot (acceleration
pump)
1. Start the engine and warm it up for 5 min-
utes.
2. Check that the engine speed at the oper-
ation point of the dashpot is within speci-
fication.
3. Attach the special service tool to spark
plug wire #1
1
.
4. 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
.
5. If out of specification, adjust the dashpot
until the specified engine speed is
obtained.
6. Open the throttle cam
2
slowly, and
check that the acceleration pump stopper
3
comes in contact with point
a
.
7. Turn the adjusting screw
4
in or out until
the specified engine speed is obtained.
8. Open and close the throttle cam a few
times, and then check that the engine
speed at the operation point of the dash-
pot is within specification. Adjust if nec-
essary.
Digital tachometer: 90890-06760
Engine speed: 2,000–2,200 r/min
S69W4050
1
Carburetor unit
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