Operation Manual

134 MS 241 C
13.6.1 Metering diaphragm
– Troubleshooting, b 3.6
– Remove the carburetor, b 13.5
: Take out the screws (arrows)
: Remove the end cover (1)
If the gasket and diaphragm are
stuck to the carburetor, they must
be removed very carefully.
: Check sealing ring (1) and
replace if necessary
– For versions with manual fuel
pump, check connector (2),
replace end cover if necessary
2410RA357 TG
1
2410RA371 TG
2
1
: Carefully separate the metering
diaphragm (1) and gasket (2)
The diaphragm material is
subjected to continuous alternating
stresses and eventually shows
signs of fatigue. In other words, the
diaphragm distorts and swells and
must be replaced.
– Examine the metering diaphragm
for signs of damage and wear, fit
a new gasket
Installation
– Note the order in which the
metering diaphragm (1) and
gasket (2) are installed
: Align the gasket (2) and metering
diaphragm (1) so that the small
holes on the tabs engage the
pins (arrows)
2310RA256 TG
12
2410RA358 TG
1
2
: Orient the end cover (1) so that
the connector (3) faces the choke
shutter and the holes align
: Fit and screw in the screws (2) –
do not tighten them
– Check that the metering
diaphragm and gasket are
correctly seated, then tighten
down the screws crosswise
The sealing ring (arrow) must not be
damaged.
– Reassemble remaining parts in
reverse order
2410RA359 TG
2
2
2
2
1
3