Stihl SR 430 - Page 14

13SR 430, SR 450
Condition Cause Remedy
Engine will not idle, idle speed too
high
Throttle shutter opened too wide by
idle speed screw (LA)
Reset idle speed screw (LA)
correctly
Oil seals/engine leaking Seal or replace oil seals/engine
Throttle shutter stiff or torsion
spring on throttle shaft fatigued or
broken
Free off throttle shaft or install new
carburetor
Engine stops while idling Idle jet bores
or ports blocked
Clean the carburetor
Setting of low speed screw (L) too
rich or too lean
Reset low speed screw (L)
correctly
Setting of idle speed screw (LA )
incorrect – throttle shutter
completely closed
Reset idle speed screw (LA)
correctly