FUEL SYSTEM
34
SRM-2620ES, SRM-2620TES
T262XS, C262S
T262TXS, C262TS
4-6 Testing carburetor
1. Remove air cleaner cover. Push purge bulb sev-
eral times to fi ll and wet fuel pump circuit with fuel.
2. Pull off black fuel line (A) from carburetor and
connect pressure tester 897803-30133 (C) to fuel
fi tting of carburetor.
3. Apply pressure to 1.5 kgf/cm
2
(21 psi).
4. If pressure remains steady, follow step 5 to 6. If
pressure drops to zero, proceed to step 7.
5. Lightly push purge bulb once (just one time).
Pressure tester reading should drop and remain
above 0.05 MPa(0.5 kgf/cm
2
)(7 psi).
6. If the reading does not drop, check if purge bulb
is defective or check metering lever height is too
low (according to “4-8 Inspecting metering lever
height”), or inlet needle valve for sticking (according
to “4-9 Inspecting inlet needle valve”).
7. Remove fuel return line (B) and throttle wire
from carburetor, then remove carburetor from en-
gine. With pressure tester attached, submerge
carburetor in suitable clean solvent and apply 0.05
MPa(0.5 kgf/cm
2
)(7 psi) pressure to locate the
leak.
8. If the air bubbles come out between pump body
and carburetor body, check the pump diaphragm,
pump gasket, and diaphragm seat of carburetor
body. Refer to 4-10.
9. If air bubbles come out from carburetor bore,
check inlet valve, metering lever spring and meter-
ing lever height. Refer to 4-8 and 4-9.
A
B
C
