Fuel Pump Inspection
NOTE
● Start the engine and keep in the idling state.
● Fuel pump is considered as satisfactory if
dispensing volume of more than 28cc in 10
seconds is obtained after disconnecting fuel
pump from caburetor and dispensing fuel over 5
seconds.
● If specified dispensing volume cannot be
obtained, check fuel tube, negative pressure tube
fuel strainer.
If there is no abnormality, replace fuel pump
with assy.
Fuel System
● Connect the Autoby starter cable to the terminal.
● Assemble the carburetor insulator and connecting
tube to the carburetor, and tighten the band screw.
● Connect the throttle cable to the carburetor.
● Rearrange the tube passing positions.(⇨ 1-10)
●Adjust the throttle operation.
● Adjust the carburetor idling.
● Adjust the pilot screws.
● Check on oil leakage.
Pilot Screw Adjustment
NOTE
● Gently tighten the pilot screw clockwise, and
unscrew in reverse for 2 turns.
● This is the optimal status of the pilot screw.
● Start the engine, and warm up the engine to a
normal operation level temperature.
● Adjust idling speed with the throttle stop screw.
Idling speed: 1,800
±±
100 rpm
● Slowly turn the pilot screw until the engine stops
running, and unscrew in reverse for 1 turn.
● Start the engine, and adjust the idling speed by
turning the throttle screw, if necessary.
5-9
Take due precautions during the assembly work
to prevent damage to the pilot screw seat.
Before checking dispensing volume, operate the
engine in warm state to adjust idling rpm to
specified range.
Screw
Autoby-
starter cable
Throttle Stop Screw
Fuel Pump
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