Repairing; Troubleshooting - Stihl FS 235 R Instruction Manual

17 Repairing

► If no grease can be seen on the end of the
screw plug (2):
► Screw the tube (1) of STIHL gear grease
into the filler hole.
► Squeeze 5 g of STIHL gear grease into the
gear housing.
► Unscrew the tube (1) of STIHL gear grease.
► Refit and tighten down the screw plug (2)
firmly.
► Run the trimmer for 1 minute.
STIHL gear grease is distributed evenly.
16.3 Adjusting the Throttle Cable
► Start the engine.
1
2
► Pull the trigger (1) without depressing the lock‐
out lever (2).
► If the engine accelerates: Hold the trigger (1)
depressed and turn screw (3) counterclock‐
wise until there is no further noticeable drop in
engine speed.
The throttle cable was over-tensioned.
► Pull the trigger (1) and hold it there without
depressing the lockout lever (2).

18 Troubleshooting

18.1 Troubleshooting Trimmer
Most malfunctions have the same causes.
► Perform the following operations:
► Replace air filter.
► Clean or replace the spark plug.
► Carry out the standard setting.
► Adjust idle speed.
► Adjust carburetor for operation at high altitude.
► If the malfunction still exists: Take the action described in the following table.
Condition
Engine does not
start.
Engine idles errati‐
cally.
0458-500-0121-B
3
Cause
Insufficient fuel in the
tank.
Engine is flooded.
Carburetor is too hot. ► Allow trimmer to cool down.
Carburetor is iced up. ► Allow trimmer to warm up to +10°C.
Carburetor is iced up. ► Allow trimmer to warm up to +10°C.
► Turn screw (3) clockwise until the engine
accelerates.
► Back off the screw (3) 1.5 turns counterclock‐
wise.
The engine idles and the throttle cable adjust‐
ment is correct.
► Shut off the engine.
16.4 Sharpening and Balancing a
Metal Cutting Attachment
Correctly sharpening and balancing metal cutting
attachments requires a lot of practice.
STIHL recommends you have metal cutting
attachments resharpened and balanced by a
STIHL servicing dealer.
► Sharpen the metal cutting attachment as
described in the instructions and on the pack‐
aging supplied with the cutting attachment you
are using.
17 Repairing
17.1 Repairing the Trimmer and
Cutting Attachment
The trimmer and cutting attachment cannot be
repaired by the user.
► If the trimmer or cutting attachment is dam‐
aged: Do not use your trimmer or cutting
attachment and contact your STIHL servicing
dealer.
Remedy
► Prepare fuel mix and refuel the trimmer.
► Clear the combustion chamber.
► Before starting the engine: Depress the manual fuel
pump bulb at least ten times.
English
19