
Section 06
FUEL SYSTEM
Sub-Section 03
(CARBURETORS)
06-03-4
2, Low Speed Screw
Check tip for a grooved condition. Replace if nec-
essary.
PUMP VERIFICATION
Check fuel pump valves operation as follows :
Connect a clean plastic tubing to the inlet nipple
and alternately apply pressure and vacuum with
the mouth. The inlet valve should release with
pressure and hold under vacuum.
WARNING : Some fuel may be present in
fuel pump. Be careful not to swallow fuel
when under vacuum.
TYPICAL
1. Fuel outlet nipple
2. Pulse nipple
3. Inlet nipple
Repeat the same procedure at the outlet nipple.
This time the outlet valve should hold with pres-
sure and release under vacuum.
3, Diaphragm
PUMP DIAPHRAGM LEAK TEST
Using a suitable pump gauge tester, perform the
following test proceeding as follows :
– Install pump gauge tester (P / N 295 000 114)
on pulse nipple.
– Pump tester until it reaches 28 kPa (4 PSI).
;
F01F0WA
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