Makita EA4300F40B Instruction Manual - Page 24
Adjusting the carburetor
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Adjusting the carburetor CAUTION: Carburetor adjustment may only be done by a specialist MAKITA service centre! SERVICE Do not undertake any adjustments to adjusting screws (H) and (L) without a tachometer! Incorrect adjustment can lead to engine damage! A tachometer is needed for adjustments to adjusting screws (H) and (L), because if the engine runs over its maximum rated speed, it can overheat and run out of lubricant. This can damage the engine! Only adjusting screw (S) can be manipulated by the user. If the saw chain moves in idle (i.e. without the throttle being pressed), it is imperative to correct the idle speed! Do not adjust the idle speed until after complete assembly and testing of the saw! Idle speed adjustment must only be undertaken when the engine is warm, with a clean air Þlter and properly installed guide bar and chain. Use a screwdriver (4 mm blade) for idle adjustments. Adjusting the idle speed Turn adjusting screw (S) counter-clockwise (unscrew): Idle speed decreases. Turn adjusting screw (S) clockwise (screw in): Idle speed increases. Important: If the saw chain still moves during idle even after you have adjusted the idle speed, do NOT use the saw. Take it to a MAKITA service centre! Note: Carburetor adjustment aids in proper functioning, economical consumption, and safe operation. Because of new exhaust regulations, the carburetor adjusting screw (H) now comes with a limit feature. The reduced adjustment range (about 180 degrees) prevents excessively rich carburetor settings. On some models, the adjusting screw (H) is locked. This ensures compliance with exhaust regulations, as well as good engine functioning and economical fuel consumption. 24 SL H