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17 Taking Care of the Guide Bar
17 Taking Care of the Guide
Bar
2
► Turn the guide bar over – every time you
sharpen the chain and every time you replace
the chain – this helps avoid one-sided wear,
especially at the nose and underside of the
bar.
► Regularly clean the oil inlet hole (1), the oil‐
way (2) and the bar groove (3)
► Measure the groove depth – with the scale on
the filing gauge (special accessory) – in the
area used most for cutting
Chain type
Chain pitch
Picco
1/4" P
Rapid
1/4"
Picco
3/8" P
Rapid
3/8"; 0.325"
Rapid
0.404"
If groove depth is less than specified:
► Replace the guide bar
The drive link tangs will otherwise scrape along
the bottom of the groove – the cutters and tie
straps will not ride on the bar rails.
18 Cleaning the Air Filter
18.1
If there is a noticeable loss of
engine power
► Turn the twist lock 90° counterclockwise.
► Remove the shroud upwards.
0458-508-8321-B
1
3
► Remove the air filter upwards.
► Wash the filter in STIHL special cleaner (spe‐
Do not use a brush to clean the filter.
Always replace a damaged filter.
19.1
Minimum
groove
The carburetor comes from the factory with a
depth
standard setting.
4.0 mm
4.0 mm
This setting provides an optimum fuel-air mixture
5.0 mm
under most operating conditions.
6.0 mm
7.0 mm
19.2
► Shut off the engine.
► Check the air filter and clean or replace if nec‐
► Check the spark arresting screen (not in all
19.3
► Turn high speed screw (H) counterclockwise
► Turn the low speed screw (L) clockwise as far
cial accessory) or a clean, non-flammable sol‐
ution (e.g. warm soapy water) and then dry.
NOTICE
19 Adjusting the Carburetor
General Information
Preparations
essary.
models, country-specific) in the muffler and
clean or replace if necessary.
Standard Setting
H
as far as stop (no more than 3/4 turn).
as stop, then turn it back 1/4 turn.
English
L
21
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