O.S. Engine OS23781400 Ball Link No.3 20K - Carburettor Linkage Ball Link  [OS23781400]

Compact ball joint designed for carburettor linkages

This O.S. Engine ball link is an RC-scale carburettor linkage component intended for use on glow engine throttle and mixture linkages where a compact ball joint connection is required. The part number OS23781400 identifies the Ball Link No.3 20K and is supplied as a single ball link designed to interface between a control rod and a carburettor lever.

Installation typically involves securing the ball link onto the linkage rod and seating the ball end into the carburettor lever or mating linkage. Keep fasteners clean and ensure the linkage travel is free from binding; small play at the joint can be used to fine-tune throttle and mixture response during bench setup.

When tuning, start with linkage geometry: shortening or lengthening the control rod and adjusting ball link positions changes leverage and throttle response. Use the ball link to achieve smooth, repeatable motion between the throttle servo or throttle arm and the carburettor without introducing excessive friction.