8-8
FUEL SYSTEM HRN216
11. Clean the float chamber vent hole with carburetor cleaner
and compressed air.
12. Clean the slow speed air/pilot screw passages.
Spray carburetor cleaner and compressed air through the
slow speed air passage.
The passages are small, so repeat several times.
13. Reinstall the 5 x 6 mm screw covering the pilot jet.
14. Check the slow speed air/pilot screw channels for
obstructions.
Spray carburetor cleaner through the slow speed air
passage.
From the opposite end, confirm that a steady stream of
carburetor cleaner sprays out from around the pilot screw
tip and transition ports.
If it does not flow around the pilot screw tip, remove the
pilot screw and clean the passage. The pilot screw must
be destroyed and replaced if it is removed. It may be more
cost-effective to replace the carburetor.
SLOW SPEED AIR/
PILOT SCREW
PASSAGES
CHOKE SIDE
THROTTLE SIDE
SLOW SPEED
AIR/PILOT SCREW
PASSAGES
Steady stream
around the pilot
screw tip and
transition ports.
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