c. CLEANING
d. INSPECTION
• FLOAT LEVEL HEIGHT
Place the carburetor in the position shown and measure the
distance between the float top and carburetor body when the
float just contacts the seat without compressing the valve
spring.
• THROTTLE/CHOKE CONTROL MOTOR
Measure the resistance between the terminals.
If the height is outside the specification, replace the float and
recheck the float height.
TOOL:
Float level gauge
07401-0010000
If the height is outside the specification, replace the float and
recheck the float height.
• Some commercially available chemical cleaners are very
caustic. These cleaners may damage plastic parts such as O-
rings, floats and float seats. Check the container for
instructions. If you are in doubt, do not use these products to
clean Honda carburetors.
• High air pressure may damage the carburetor. Use low air
pressure [206 kPa (2.11 kgf/cm
2
, 30 psi) or less] when cleaning
passages and ports.
1) Clean the carburetor body with high flash point solvent.
2) Use low air pressure and clean the following passages and
ports:
– Vent port
– Pilot screw hole
– Pilot jet hole
– Pilot air jet
– Main air jet
– Transition ports
– Pilot outlet
– Main nozzle holder
NOTICE
4-10
Standard float height
13.2 mm (0.52 in)
Standard
Between 1 and 3: 50 – 70
Ω
resistance
Between 2 and 4: 50 – 70
Ω
1
3
4
2
[2] VENT PORT
[3]
TRANSITION
PORTS
[6]
PILOT SCREW
HOLE
[10]
PILOT JET
HOLE
[4] PILOT OUTLET
[1] ENGINE BLOCK SIDE:
[5] AIR CLEANER SIDE:
[9]
MAIN NOZZLE
HOLDER
[1] FLOAT LEVEL GAUGE
07401-0010000
[7] PILOT AIR JET
[8] MAIN AIR JET
To prevent serious eye injury, always wear safety goggles or
other eye protection when using compressed air.
CAUTION
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