Taking Care Of Guide Bar; Cleaning The Air Filter - Stihl MS 191 T Instruction Manual

Taking Care of Guide Bar

2
1
:
Turn the 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 oilway (2) and
the bar groove (3).
:
Measure groove depth –
with scale on filing gauge* – in area
used most for cutting.
* see "Guide to Using this Manual"
MS 191 T
Chain Pitch
type
Picco 3/8" P
Rapid 1/4"
Rapid 3/8"; 0.325" 0.24"
3
Rapid 0.404"
If groove depth is less than specified:
:
Replace the guide bar.
The drive link tangs will otherwise
3
scrape along the bottom of the groove –
the cutters and tie straps will not ride on
the bar rails.

Cleaning the Air Filter

Minimum
groove
depth
0.20"
(5.0 mm)
0.16"
(4.0 mm)
(6.0 mm)
0.28"
(7.0 mm)
Dirty air filters reduce engine power,
increase fuel consumption and make
starting more difficult.
When there is a noticeable loss of
engine power:
:
Press down the throttle trigger
interlock and set the choke lever
to l.
: Loosen screw (1) on filter cover (2).
: Swing the filter cover up and take it
off.
:
Clean away loose dirt from around
the filter.
English / USA
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1
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