Maintenance Tip
Engine vibration creates extreme stress and motion in the carb heat control system. Friction is required to dampen the vibration and wear in the carb heat cable, airbox, and airbox butterfly system. McFarlane’s carb heat cables have a built-in friction/tension system to reduce vibration wear and provide a smooth consistent feel to the control. We use a heavier inner wire with modified hardness for reliability and preventing wear. Our controls have high temperature Teflon liner to prevent metal-to-metal vibration wear.
Our novel air box butterfly bearings are made from a special captured rubber elastomer to reduce carb heat control system wear. Our vibration dampening carb heat controls stay in place and do not move from vibration. The carb heat controls last much longer with our McFarlane improvements!

Replace your old, worn, carb heat cable with a new McFarlane FAA-PMA approved cable.