Model Engine Company of America


If you have a rear induction drum valve engine made by us it will only run CCW. None were ever made to run CW.

Due to the radical timing it will sometimes start and run CW at low RPM's but when the throttle is opened it will either die or reverse rotation on its own.

This is true with any higher performance front or rear induction engine.

Note: Any reed valve (like a Cox Baby Bee) or sub-piston port engine will run either direction.

If you have a disk valve check this link Disk Valve Rotation

Also See Crank Rotation


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.

© 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

Linking to this page is permissible, However no part may be reproduced without written permission from
MECOA K&B Mfg -- 16015 Adelante St -- Irwindale, CA 91702 U.S.A.