81MS 461, MS 461-R
Installing
: Fit the inlet needle (1).
: Fit the spring (2) in the bore.
: Position the inlet control lever (3)
with spindle (2) on the spring
(arrow) first, then slide the inlet
control lever’s clevis into the
groove in the inlet needle (1).
Make sure the spring locates on the
control lever’s nipple.
– Press the inlet control lever down
and secure it with the screw.
– Check that the inlet control lever
moves freely.
– Install the metering diaphragm,
b 12.5.1
3443RA306 TG
1
2
3443RA307 TG
2 31
12.5.3 Pump Diaphragm
– Troubleshooting, b 3.6
– Remove the carburetor, b 12.4
: Take out the screw (1) and
remove the end cover (2).
If the gasket and pump diaphragm
are stuck to the carburetor, remove
them very carefully.
: Carefully remove the pump
diaphragm with gasket.
3443RA308 TG
1
2
3443RA309 TG
: Carefully separate the pump
diaphragm (1) and gasket (2)
The diaphragm material is
subjected to continuous alternating
stresses and eventually shows
signs of fatigue, i.e. the diaphragm
distorts and swells and has to be
replaced.
– Check the pump diaphragm for
signs of damage and wear. Install
a new gasket.
– Check fuel strainer for
contamination and damage.
Clean or replace if necessary.
: Use a needle to remove the fuel
strainer (1) from the carburetor
body. Clean or replace the fuel
strainer.
– Reassemble in the reverse
sequence.
3443RA310 TG
1
2
3443RA311 TG
1
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