Makita DCS4600S Instruction Manual

Makita DCS4600S Instruction Manual Manual pdf 18 page image

18AHS LS -+H -+S -+L -+HCAUTION:Carburetor adjustment must only be done with the enginewarm, a clean air filter and the saw chain properly tensionedand mounted. Always have a MAKITA service centre docarburetor adjustment, since incorrect adjustment cancause considerable damage to the engine.Due to new emissions regulations, the adjustment range ofscrews (H) and (L) has been limited. This adjustment rangelimitation (to about 180 degrees) prevents over-rich set-tings. This ensures compliance with emissions regulations,optimum engine performance and economical fuel consump-tion.Factory setting of adjustment screws (H) and (L):Screwed out almost all the way (counter-clockwise).For proper adjustment, proceed as follows:Checking adjustment screw (H)Before starting, make sure that adjustment screw (H) is un-screwed all the way (until you feel a stop). Limitations do notprotect against too lean running (insufficient fuel)!1. Start engine and let it warm up (3-5 minutes)2. Set idle3. Set highest permissible speed.4. Check acceleration5. Check idle speed2. Set idleSet the idle speed per the technical specifications.Turning the adjusting screw (S) in (clockwise) increases theidle speed. Turning it out (counter-clockwise) lowers theidle speed. The chain or blade must not move in idle!3. Set the top speedSet the top speed with a minimal adjustment to screw (H)in accordance with the technical data.Screwing in adjustment screw (H) clockwise increasesengine speed. Never exceed the top speed under anycircumstances!4. Check accelerationWhen the throttle is pressed, the engine should gosmoothly from idle to high speed.Unscrew adjustment screw (L) counter-clockwise insmall steps until acceleration is good.5. Checking the idle speedAfter setting the maximum permissible speed, checkthe idle speed (the saw chain or cutting tool must notturn in idle).Repeat the adjustment procedure starting with step2 above until idle speed, acceleration, and speed areall good.Adjusting the carburetor