FUEL SYSTEM
PB-2520
EB252
39
6-7 Testing carburetor
NOTE:
To perform this test, carburetor interior
should be wet with fuel. If dry, a little leakage may
occur.
1. Remove air cleaner cover.
2. Disconnect black fuel line from carburetor and
connect pressure tester 897803-30133 (A) to fuel
inlet of carburetor.
3. Apply pressure approx. 100 kPa (1 kgf/cm
2
) (14
psi).
4. If pressure remains steady, follow step 5 and 6.
If pressure drops, proceed to step 7.
5. Lightly push purge bulb once. Pressure tester
reading should drop and remain above 50 kPa (0.5
kgf/cm
2
) (7 psi).
6. If reading does not drop, inspect inlet needle
valve for sticking or metering lever height is too
low.
7. If pressure drops at step 3, or if pressure drops
below standard
¿
gure at step 5, remove carbure-
tor from the unit, disconnecting fuel return line and
throttle rod.
8. Submerge carburetor in suitable clean solvent to
locate the leak by applying pressure approx. 100
kPa (1 kgf/cm
2
) (14 psi).
9. If air bubbles come out between pump cover
and carburetor body (B), inspect pump diaphragm,
pump gasket, and diaphragm seat of carburetor
body (Refer to “6-11 Inspecting diaphragm”).
10. If air bubbles come out from throttle bore (C),
inspect inlet valve, metering lever spring, and me-
tering lever height (Refer to “6-10 Inspecting inlet
needle valve”).
B
C
A
