266-12. Stopping the engineDepress the combination switch (1).NOTE: After being pressed down, the combination switch willrevert to the ON position again. The engine is switched off, butcan be turned on again without moving the combination switch.IMPORTANT: To cut off the ignition current, push thecombination switch all the way down past the resistance pointto the safety position ( ).6-13. Checking the chain brakeThe chain brake must be checked before every use of thesaw!Start the engine as described above (have a secure footing,place the chain saw on the ground so that the chain and guidebar are not near anything).(Fig. 57)Hold the front handle firmly, with your other hand on the reargrip.Let the engine run at medium speed and push the handguard(6) in the direction of the arrow using the back of your hand,until the chain brake engages. The chain should now stopimmediately.Bring the engine back to idle and release the chain brake.Caution: If the chain does not stop immediately in thistest, turn off the engine immediately. Do NOT use thechain saw in this condition! Contact a MAKITA authorizedservice center.6-14. Adjusting the carburetor(Fig. 58)CAUTION: Carburetor adjustment may only be done by aspecialist MAKITA service center!SERVICEOnly adjusting screw (S) can be manipulated by the user.If the saw chain moves in idle (i.e. without the throttle beingpressed), it is imperative to correct the idle speed!Do not adjust the idle speed until after completeassembly and testing of the saw!Idle speed adjustment must only be undertaken whenthe engine is warm, with a clean air filter and properlyinstalled guide bar and chain.Use a screwdriver (4 mm blade) for idle adjustments.Adjusting the idle speedTurn adjusting screw (S) counter-clockwise (unscrew): Idlespeed decreases.Turn adjusting screw (S) clockwise (screw in): Idle speedincreases.Important: If the saw chain still moves during idle evenafter you have adjusted the idle speed, do NOT use thesaw. Take it to a MAKITA service center!