12.1 Air Filter

Dirty air filters reduce engine power, increase fuel consumption and make starting more difficult. The air filter should be checked when there is a noticeable loss of engine power.

• -See also Troubleshooting, b 3.6, b 3.7
• -Remove the shroud, b 6.4
• : Rotate the air filter (1) counterclockwise and lift it away.
• -Check the air filter and clean or replace if necessary
• see instruction manual.
• -Reassemble in the reverse sequence.

12.2 Baffle

• -Remove the air filter, b 12.1
• : Unscrew the nuts (arrows).
• : Remove the baffle (1).
• -Check the baffle and replace it if necessary
• -Reassemble in the reverse sequence.

12.3 Filter Base

• -Remove the air filter, b 12.1
• -Remove the baffle, b 12.2
• -Remove the choke rod, b 10.3.3
• -Remove the switch shaft, b 10.1
• : Push the short circuit wire (1) out through the opening (arrow).

Models with heating

• : Pull the wire (1) out of the guide (arrows).

All models

• : Pry the filter base (1) out of the buffer (2).

• : Swing the filter base (1) in direction of throttle trigger until it is clear of the studs.

• : Turn the filter base (1) in direction of ignition side.

• : Disengage the filter base (1) from the buffer (2).

• -Remove the contact spring, b 7.7.4

• -Check the buffers (1) and replace if necessary, b 9.5.2

Installing

• -Fit the contact spring, b 7.7.4
• -Use STIHL press fluid to simplify assembly, b 15
• : Engage the filter base (1) in the buffer (2) - make sure the peg (3) is properly seated in the buffer.
• : Push the short short circuit (1) through the opening (arrow).
• : Position the short circuit wire (1) so that it is above the ground wire's flag terminal (arrow).
• : Push the filter (1) onto the studs and the carburetor (2).
• -Use STIHL press fluid to simplify assembly, b 15
• : Engage the filter base (1) in the buffer (2).

Models with heating

• : Fit the wire (1) in the guide (arrows).
• -Reassemble all other parts in the reverse sequence.

12.4 Air Guide Shrouds

• -Remove the fan housing, b 8.2
• -Remove the filter base, b 12.3
• -Remove the throttle rod, b 10.3.4
• -Remove the carburetor, b 12.5
• -Remove the carburetor carrier, b 12.8
• -Pull the boot off the spark plug.

2

1

1

5902RA460 TG

• : Take out the screw (1).
• : Lift the air guide shroud (2) a little and pull it out of its seats.

5902RA459 TG

• : Lift the air guide shroud (1) a little and pull out the ignition lead (2) - take care not to distort the air guide shroud.

2

1

1

5902RA463 TG

• : Push the tab (1) towards the ignition side and lift the air guide shroud (2).

5902RA461 TG

• : Pull out the shutter (1), check it and replace if necessary.

1

5902RA462 TG

2

• : To simplify disassembly, lift the bottom of the air guide shroud (2) slightly during the following steps.
• : Push the tab (1) towards the clutch side and lift the air guide shroud (2) out of its seat.

2

• : Pull the air guide shroud (1) out of its seats and lift it away, removing the fuel hose (2) through the opening (arrow) at the same time.

Installing

1