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FUEL AND LUBRICATION SYSTEM 5-12
FLOAT
HEIGHT ADJUSTMENT
NEEDLE VALVE
f o check the float height, invert the carburetor
If foreign matter is caught between the valve seat
body, with the float arm kept free,
measure
the
and the
needle, the gasoline will continue
to
flow
height
@
while float arm is just in contact with
and result in overflowing. If the seat and needle are
needle valve by using calipers. Bend the tongue
worn out beyond the permissible limits, similar
@
as
necessary t o bring the height
(@
to this
trouble will occur. Conversely, if the needle sticks,
value.
the gasoline will not flow into the float chamber.
Remove
the carburetor, float chamber and floats,
and clean the float chamber and float parts
with
gasoline.
If the needle is worn
as
shown below,
replace id together with
a
valve seat. Clean the
fuel
passage of the mixing chamber with compressed
air.
Be sure to remove the
gasket before measur-
ing
the height.
Check following items for any damage or clop
ging.
*
Pilot
jet
Main jet
*
Main air jet
Pilot air jet
Needle jet air bleeding holes
Float
* Needle
valve mesh and O-ring
*
Diaphragm
Gasket and O-ring
Throttle valve shaft oil seals
Drain plug O-ring
Pilot screw bleeding hole and rubber
*
Pilot outlet and bypass holes
*
Fuel pipe O-rings
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