Removing And Installing The Carburetor - Stihl 029, 039 Service Manual

STIHL 029, 039
11.2 Removing and Installing
the Carburetor
Top:
Flanged lock nuts
Bottom:
Detaching throttle rod
The all-position diaphragm carburetor
consists of a fuel pump and the actual
carburetor. Although the fuel pump
shares a common housing with the
carburetor, it operates as a complete-
ly separate and independent unit.
Troubleshooting chart - see 2.6.
- Remove the air filter - see 11.1.
Top:
Detaching throttle rod
Bottom:
Removing grommet for adjusting screws
Note: For removal of carburetor on
machines with automatic choke -
see 11.6.8.
- Unscrew the flanged lock nuts
from the mounting studs.
- Disconnect the throttle rod from
the throttle trigger.
- Disconnect the throttle rod from
the throttle shaft.
Removing the carburetor
1 = Fuel hose
- Remove the grommet from the
adjusting screws and pull it out of
the handle housing.
- Pull the carburetor off the studs
and pry the fuel hose off the
elbow connector at the same time.
Installation is a reversal of the
removal sequence.
Note: Check that sleeve (in manifold)
and washer are in place before fitting
the carburetor in position. Push the
fuel hose on to the elbow connector
on left side of carburetor. After fitting,
check that elbow connector on
underside of carburetor is properly
engaged in impulse hose. Fit new
flanged lock nuts and torque them
down to 3.2 Nm (2.4 Ibf.ft).
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