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CARBURETOR
EC464301
Throttle valve
1. Check:
Free movement
Stick → Repair or replace.
NOTE:
Insert the throttle valve 1 into the carburetor
body, and check for free movement.
EC464401
Jet needle
1. Inspect:
Jet needle 1
Bends/wear → Replace.
Clip groove
Free play exists/wear → Replace.
Clip position
Standard clip position:
No. 2 Groove
Fuel level
1. Measure:
Fuel level a
Out of specification → Adjust.
Fuel level:
6.0 ~ 7.0 mm (0.24 ~ 0.28 in)
Below the float chamber mat-
ing surface
Measurement and adjustment steps:
Connect the fuel level gauge 1 to the float
chamber.
Fuel level gauge:
YM-01312-A/90890-01312
Hold the fuel level gauge vertically next to
the float chamber mating surface.
Loosen the drain screw.
Measure the fuel level with the fuel level
gauge.
NOTE:
Keep the carburetor and fuel level gauge
vertically when measuring the fuel level.
If the fuel level is not within specification,
inspect the needle valve seat and needle valve.
If either is worn, replace them both.
If both are fine, adjust the fuel level by
bending the float tab b on the float.
Recheck the fuel level.
4 - 7
ENG
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