CS-350WES
31
FUEL SYSTEM
4-9 Checking metering lever height
1. Remove carburetor.
2. Remove metering diaghragm cover, metering
diaghragm and gasket.
3. Check the metering lever height.
Metering lever height : 1.65 mm (0.068 in)
lower than (A)
4. If necessary, gently bend the lever up or down to
set metering lever at correct position.
NOTE: When the metering lever is :
Too high Fuel flooding
Too low Fuel starvation / overheating
1.65
0.4
1.35
1.5
(A)
(A)
(B)
(D)
(E)
(F)
(C)
4-10 Checking diaphragm
1. Check metering diaphragm (A) for hardening,
distortion, or pin hole. Replace as required.
2. Remove pump cover (F), pump diaphragm (D),
and pump gasket (E).
3. Check pump diaphragm (D) and replace if
hardened or curled at the valve tabs.
4. Check metering gasket (B) and pump gasket (E)
and replace if defective.
5. Check inlet screen (C) if blocked, remove and
clean it, or replace.
6. Clean fuel passages in carburetor body with
compressed air.
NOTE: Before cleaning metering side with
compressed air, turn “H” needle clockwise until lightly
seated and remove inlet needle valve. Otherwise,
main nozzle check valve or inlet needle valve spring
may be damaged by the compressed air.
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