O.S. Engine OS72200080 Needle-valve Extension for Model Engine Tuning  [OS72200080]

Summary of the extension cable

The O.S. Engine OS72200080 needle-valve extension cable set is designed to provide a convenient external control point for the carburettor needle on model engines, reducing the need for repeated partial disassembly during tuning.

Compatibility and planning: this set is useful when you want to shift needle access to a reachable external position for trimming mixture or idle while the engine remains mounted. Inspect likely cable pathways and confirm there is adequate clearance before installation.

Fitting and operational tips: run the cable from the carburettor to the external access location, secure it to avoid chafing or kinking, and ensure the needle moves smoothly through its range before using the engine. The extension permits fine adjustments externally, saving time during tuning sessions.