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Section 05
FUEL SYSTEM
Sub-Section 04
(CARBURETORS)
05-04-4
1. Screw
Remove carburetors.
CLEANING
The entire carburetor should be cleaned with a
general solvent and dried with compressed air be-
fore disassembly.
Carburetor body and jets should be cleaned with
a carburetor cleaner. Follow manufacturer’s in-
structions.
Inspect O-rings, diaphragms and gaskets.
DISASSEMBLY AND INSPECTION
Inspect parts for corrosion damage (shaft, throttle
plate, spring, screw, check valve housing, etc.).
1, Needle Valve
Inspect needle valve tip for a grooved condition. If
worn, needle and seat must be replaced as a
matched set.
2, Low Speed Screw
Check tip for a grooved condition. Replace if nec-
essary.
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).
TYPICAL
1. Pump gauge tester
2. Install on pulse nipple
Diaphragm must stand pressure for 10 seconds.
If pressure drops, replace diaphragm.
4, Pump Body
Check fuel pump valve 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.
-
CAUTION
Be careful at carburetor cleaning not to remove
paint. Paint removal will cause carburetor to
rust very rapidly. Repaint if necessary.
◆
WARNING
Solvent with a low flash point such as gaso-
line, naphtha, benzol, etc., should not be
used as they are flammable and explosive.
-
CAUTION
Heavy duty carburetor cleaner may be
harmful to the rubber parts, O-rings, etc.
Therefore, it is recommended to remove
these parts prior to cleaning.
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Содержание 1997 GSI
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