Stihl MS 18 Servise Manual page 23

10. Carburetor Mixture Screws
The 1130 saws do not have
mixture screws or limiter caps
Notice that the H and L holes are
not threaded and are blocked off
internally
The only adjustment on a 1130
saw is to set the idle speed with
this screw
It also makes slight mixture
adjustments as the idle speed is
tuned
This carburetor uses a fixed
orifice jet to regulate the amount
of fuel available to the engine
and is not adjustable
© STIHL Inc., Virginia Beach, VA 2013
10. Carburetor Screw Settings
Limiter caps can be removed by
the service technician for carb
service
Removal of this style of limiter
cap is done with the 5910 890
4501 tool
Anytime a cap is removed best
practice is to replace it with a
new one
On the 1130 saws this step
does not apply
© STIHL Inc., Virginia Beach, VA 2013
US/STR
US/STR
4229 121 2701
confidential
confidential
23