Stihl TS 420 - 12.2.1 Leakage testing; 12.3 Repairing the carburetor; 12.3.1 Metering diaphragm

78 TS 410, TS 420
– Remove and examine the
gasket (1), replace if necessary.
: Hook the gasket (1) into the
mount (2) and fit it in the sleeves
(arrows) to secure it.
– Examine the fuel hoses, replace
if necessary, b 12.8.2.
: Position the carburetor and
connect the fuel hose (1) to the
connector (arrow).
370RA325 TG
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2
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370RA326 TG
– Close the choke shutter.
: Slide the carburetor (1) between
the tank housing and manifold so
that the holes in the tank housing
line up with those in the
carburetor.
– Check and adjust the position of
the gasket if necessary.
: Insert screws (arrows) through
the tank housing and carburetor.
– Insert and tighten down screws in
the flange of the manifold.
– Check correct functioning and
easy movement of the choke
shutter.
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370RA327 TG370RA322 TG
: Connect the fuel hose (1) and
compensator hose (2) to the
connectors (arrows).
: Hook the throttle rod (1) into the
throttle shaft lever (arrow).
: Place the throttle rod in the
mount (2). It is now in position for
the subsequent installation steps.
– Attach the choke rod, b 11.2.1.
– Reassemble remaining parts in
reverse order.
– Check correct functioning.
– Tightening torques, b 3.5.
370RA329 TG
2
1
1
370RA330 TG
2