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ENG
CARBURETOR
EC464401
Jet needle
1. Inspect:
●
Jet needle
1
Bends/wear
→
Replace.
● Clip groove
Free play exists/wear → Replace.
● Clip position
Float height
1. Measure:
● Float height a
Out of specification → Adjust.
Standard clip position:
No.2 Groove
Float height:
15.5 ~ 16.5 mm (0.61 ~ 0.65 in)
Measurement and adjustment steps:
● Hold the carburetor in an upside down
position.
NOTE:
● Slowly tilt the carburetor in the opposite
direction, then take the measurement
when the needle valve aligns with the float
arm.
● If the carburetor is level, the weight of the
float will push in the needle valve, result-
ing in an incorrect measurement.
● Measure the distance between the mating
surface of the float chamber and top of the
float using a vernier calipers.
NOTE:
The float arm should be resting on the nee-
dle valve, but not compressing the needle
valve.
● If the float height is not within specifica-
tion, inspect the valve seat and needle
valve.
● If either is worn, replace them both.
● If both are fine, adjust the float height by
bending the float tab 1 on the float.
● Recheck the float height.
