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Stihl |
FS46 FS80 FS75 FS76 FR85 Trimmer FC FS FR HL HT KM 70 75 80 85 FC72 Edger, FC75, FC85, FH75, FR85, FS75, FS80 |
Replaces |
4137 120 0614 C1Q-S63,4137-120-0606, (2003) 4137 120 0608 C1Q-S69 (2009) ,4137 120 0614 C1Q-S157 (2017) |
● Drain screw: used to drain the fuel out of the carburetor.
● Idle mixture screw: controls the intake of fuel to adjust the engine for optimum running.
● Idle speed screw: controls the intake of air to adjust the engine’s idle speed.
● High-speed screw: adjustment for high speed.
● Low-speed screw: adjustment for low speed.
● Turn clockwise to decrease the RPM (revolutions per minute) while turning counterclockwise is for increasing the RPM. The amplitude for each adjustment is 1/4 turn.
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