MS 194 T
English
29
If the filler cap will not engage into the 
fuel tank housing
If the cap does not drop fully into the fuel 
tank opening when the positioning 
marks (1, 2) line up, or if it does not 
tighten properly when turned, the base 
of the cap may be prematurely rotated in 
relation to the top. Such misalignment 
can result from handling, cleaning or an 
improper attempt at tightening.
– Illustrations A and B: The base of 
the cap is prematurely rotated to the 
closed position and is not in the 
correct starting position for 
installation. The tank will not seal in 
this configuration. Note: in 
Illustrations A and B, the interior 
positioning marks (1) are in line with 
the exterior position marks (2).
– Illustration C: The bottom of the cap 
is in the correct starting position for 
installation. Note: In Illustration C, 
the interior positioning mark (1) is 
under the grip and not in line with 
the outer position mark (2).
To return the base of the cap to the 
proper starting position for installation:
N Drop the cap into the fuel tank 
opening (A).
N Next, turn the cap counter-
clockwise with slight pressure until it 
drops fully into the fuel tank opening 
(approximately 1/4 turn) (B). This 
will rotate the base of the cap into 
the correct starting position for 
installation (C). The exterior 
positioning mark (1) on the cap will 
line up with the "unlocked" 
symbol (2) on the fuel tank housing. 
The interior positioning mark should 
be under the grip and not in line with 
the outer positioning mark (1).
N Then, turn the cap clockwise, 
closing it normally.
If your fuel cap still does not tighten 
properly, it may be damaged or broken. 
Stop using the chain saw and take it to 
your authorized STIHL dealer for repair.
For automatic and reliable lubrication of 
the chain and guide bar – use only an 
environmentally compatible quality 
chain and bar lubricant. Rapidly 
biodegradable STIHL BioPlus is 
recommended.
NOTICE
Biological chain oil must be resistant to 
aging (e.g. STIHL BioPlus),  since it will 
otherwise quickly turn to resin. This 
results in hard deposits that are difficult 
to remove, especially in the area of the 
chain drive and chain. It may even cause 
the oil pump to seize.
The service life of the chain and guide 
bar depends on the quality of the 
lubricant. It is therefore essential to use 
only a specially formulated chain 
lubricant.
WARNING
Do not use waste oil. Renewed contact 
with waste oil can cause skin cancer. 
Moreover, waste oil is environmentally 
harmful.
NOTICE
Waste oil does not have the necessary 
lubricating properties and is unsuitable 
for chain lubrication.
ABC
1
2
1
2
2
1
0000-GXX-6421-A0 
1
2
A
BC
0000-GXX-6422-A1 
Chain Lubricant