Vacuum Servo Chain

NOTE: Before adjusting servo chain, carburetor throttle must be at idle position, ignition must be off and choke valve fully open.

To install vacuum servo chain, insert chain in vacuum servo hook. Stretch chain linkage to carburetor until chain is fully extended and clevis pin hole aligns with hole in throttle lever. If holes do not line up, adjust chain at servo hook (one ball at a time) until free pin fit is obtained. When properly adjusted, there should be a slight deflection in chain without moving either carburetor throttle lever or servo. After adjustment, bend servo hook tabs together.

NOTE: Chain must be free in hook after bending tabs