Stihl BT 45 - Metering Diaphragm

26 BT 45
: Inspect the metering diaphragm
and gasket, and replace if
necessary - b 8.4.2
Assemble in the reverse sequence.
VA
936RA025
– Remove the flange on manual
fuel pump with square end cover
- b 8.4.1
: Remove the metering
diaphragm (1) and gasket (2)
from the carburetor body.
VA
936RA026
1
2
If the gasket and diaphragm are
stuck to the carburetor, remove and
separate them very carefully.
: Inspect the diaphragm and
gasket and replace if necessary.
The diaphragm is a very delicate
component. As a result of the
alternating stresses the material
eventually shows signs of fatigue,
i.e. the diaphragm distorts and
swells and has to be replaced.
Assemble in the reverse sequence.
: Place the gasket (1) on the
carburetor body.
Line up the hole in the gasket (2)
with the compensating bore in the
carburetor.
VA
936RA027
1
2
: Place the metering
diaphragm (1) on the gasket.
Line up the hole in the metering
diaphragm (1) with the
compensating bore in the
carburetor and the gasket.
VA
936RA028
1
Reassemble as described in
b 8.4.1
8.4.2 Metering Diaphragm