How to adjust a K&B Mixture Disk Carb
	First you need to know how the carb works. Metering the fuel mixture at idle is done with the actual rotation of the barrel. This is the way the mixture disk works on the K&B carb. As the barrel is rotated the outer sleeve rotates with the barrel and the inner tube remains stationary as it is attached to the carb body. This type of design requires very little movement to the idle adjustment. The adjustment is made by rotating the inner tube only a few degrees in either direction so the slot is open or closed more at idle.
	Both slots must be pointed down into the engine. The barrel must close in the clockwise direction when looking at the throttle arm side. Several versions of this carburetor although they all operate the same. Click here for versions As some of the K&B mixture disk carbs do not have an idle stop screw so you must be sure the barrel is positioned correctly. Follow the general tuning instructions click here
	If you can not obtain a consistent mixture or a rich enough high speed mixture check inside the spray bar. Many times something is plugging up the metering slot that controls the fuel flow for idle and midrange. Symptoms are not being able to obtain idle settings, not getting a rich enough high speed setting, and erratic settings.

The above information is provided as a guide. Since MECOA/K&B has no way of determining the ability of the individual using and understanding this information, we assume absolutely NO RESPONSIBILITY for any damage to person or property from the use of this information.

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MECOA -- P.O. Box 98 -- Sierra Madre, CA 91025 U.S.A.

©2006-2004 Model Engine Corporation of America, All rights reserved. MECOA and K&B are Registered Trademarks of Model Engine Corp. of America Registered U.S. Patent Office

©2006-2004 Model Engine Corporation of America, All rights reserved.
MECOA and K&B are Registered Trademarks of Model Engine Corp. of America
Registered U.S. Patent Office