Stihl MS 290 Manual De Instrucciones página 35

English / USA
1
2
: Pull prefilter (1) upward and out.
: Pull off the spark plug boot (2).
34
: Use a screwdriver to remove the
shutter (3) from the shroud.
: Turn the shutter 180° and refit it on
the left of the spark plug
(see illustration).
:
Refit the spark plug boot.
1
1
: Install the prefilter (1) so that the
symbol r (winter operation) points
up.
:
Refit carburetor box cover and
secure it with the twist lock.
Heated air is now drawn in from around
the cylinder and mixed with cold air –
this helps prevent carburetor icing.
At temperatures above +20 °C
(70°F)
: Return shutter and prefilter to
position s (summer operation).
This is essential to avoid engine
running problems, i.e. overheating!
MS 290, 310, 390