MS 194 C
English
33
mark (1) lined up with the 
"unlocked" symbol (2) on the fuel 
tank housing.
N Using the grip, press the cap down 
firmly while turning it clockwise to 
the closed position (approximately 
1/4 turn). In the closed position, the 
interior (4) and exterior (1) 
positioning marks will align with the 
"locked" symbol (3) on the fuel tank 
housing.
N Fold the grip flush with the top of the 
cap and check for tightness.
WARNING
If the grip does not lie completely flush 
with the cap or the detent on the grip 
does not fit in the corresponding recess 
in the tank opening, or if the cap is loose, 
the cap is not properly seated and you 
must repeat the above steps. Also refer 
to the procedure below for returning the 
base of the cap to the proper starting 
position for installation.
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 Turn the cap (with the grip up) until 
it drops into the fuel tank opening.
N Next, turn the cap counter-
clockwise as far as it will go 
(approximately 1/4 turn). This will 
rotate the base of the cap into the 
correct starting position for 
installation. The exterior positioning 
mark (1) on the cap will line up with 
the "unlocked" symbol (2) on the 
fuel tank housing.
N Then, turn the cap clockwise, 
closing it normally.
N If your fuel cap still does not tighten 
properly, it may be damaged or 
broken. Stop using the unit and take 
it to your authorized STIHL dealer 
for repair.
3
1
4
0000-GXX-6427-A0 
ABC
1
2
1
2
2
1
0000-GXX-6421-A0 
1
2
0000-GXX-6422-A0