3-8 FUEL SYSTEM
Idle Speed Inspection
Refer to Idle Speed Inspection in the Periodic Maintenance Chapter.
Idle Speed Adjustment
Refer to Idle Speed Adjustment in the Periodic Maintenance Chapter.
Fuel Level Inspection
Gasoline is extremely ﬂammable and can be explosive under
certain conditions. Always stop the engine and do not smoke.
Make sure the area is well-ventilated and from any source of
ﬂame or sparks; this includes any appliance with a pilot light.
Remove the carburetor, and hold them in true vertical position on a
Put the fuel tank on a bench, and connect the fuel tap to the carburetor
using a suitable hose.
Prepare a rubber hose [A].
Connect the fuel gauge [B] to the carburetor ﬂoat bowl with the rubber
Special Tool -
Fuel Level Gauge: 57001–1017
Hold the gauge vertically against the side of the carburetor body so
that the "middle" line [C] is several millimeters higher than the bottom
edge of the carburetor body.
Turn the fuel tap to the ON position to feed fuel to the carburetor, then
turn out the carburetor drain plug a few turns.
Wait until the fuel level [D] in the gauge settles.
Keeping the gauge vertical, slowly lower the gauge until the "middle"
line is even with the bottom edge [E] of the carburetor body.
Do not lower the "middle" line below the bottom edge of the
carburetor body. If the gauge is lowered and then raised again,
the fuel level measure shows somewhat higher than the actual fuel
level. If the gauge is lowered too far, dump the fuel out of it into
suitable container and start the procedure over again.
Read the fuel level in the gauge and compare it to the speciﬁcation.
3.0 ± 1 mm below the bottom edge of carburetor body
Screw in the carburetor drain plug.
Turn the fuel tap to the OFF position and remove the fuel level gauge.
If the fuel level is incorrect, the ﬂoat level can not be adjusted on
this model. Inspect the ﬂoat, ﬂoat valve needle, and the contacting
surface between the carburetor body and its ﬂoat valve needle. If
they are damaged, replace them.
Install the carburetor.