Stihl FS 120, FS 200, FS 300, FS 350, FS 400 and FS 450 series of garden tools repair guide will help with the Carburetor Removal and Installing. The FS series of the engine are often found in strimmers, brush cutters, edgers, and other tools. A Service Manual detailing the Carburetor Removal and Installing procedures including full diagrams, as well as more complete repair information, is available to download. Also, a Stihl FS120, FS200, FS300, FS350, FS400, and FS450 Parts List, Operator Manual, and carburetor manual are also available to view or download as a PDF which can be read on any device or printed.

Carburetor

Removing and Installing

FS 120…350, FR 350

Troubleshooting chart – see “Standard Repairs, Troubleshooting” handbook.

Important: In the event of trouble with the carburetor or the fuel supply system, always check and clean the tank vent – see 8.3.

• Remove the shroud – see 4.1.
• Remove the air filter – see 8.1.
• • Take out screw (1) of the extended throttle cable.

• • Pry choke knob (2) out of filter housing and pull it off the choke shaft.
• • Take fuel hose out of retainer in the filter housing.
• Disconnect fuel hoses from the manual fuel pump.
• Unscrew the nuts.
• Remove the filter housing and pull stub out of grommet at the same time.
• Check heat shield (1). If necessary, push out the grommet (2) and remove the heat shield.
• Disconnect throttle cable nipple

• • 1. from slotted pin (2) on the throttle lever.
• Pull the fuel hose (3) off the elbow connector on the carburetor.
• Pull carburetor off the studs.

– If necessary, pull fuel hose off the carburetor.

Removing and Installing

• Remove the gasket.

Reassemble in the reverse sequence.

• Use a new gasket.
• Tighten down nuts on filter housing to 3.5 Nm (2.6 lbf.ft).
• Tighten down screw on extended throttle cable to 6.0 Nm

(4.4 lbf.ft).

FS 400/450, FR 450

• Remove the shroud – see 4.1.
• Take out screw (1).
• Unscrew the nuts (2).
• Remove the filter housing and pull stub out of grommet at the same time.

• Disconnect fuel hose from the connector.
• Pry choke knob out of carburetor housing and pull it off the choke shaft.
• Disconnect throttle cable nipple

(1) from slotted pin (2) on the throttle lever.

• Disconnect fuel hose (3) from the carburetor.
• Pull carburetor off the studs.

 

Stihl FS 120, FS 200, FS 300, FS 350, FS 400, FS 450 Carburetor Removal and Installing