O.S. Engine OS4A407030 Precision GGT10 Carburettor Nipple Fitting  [OS4A407030]

Precision replacement nipple for O.S. carburettors

The O.S. Engine nipple is supplied as a replacement component for O.S. carburettor assemblies, intended to ensure proper fuel line coupling and sealing during routine servicing. The following notes address correct fitment, compatibility checks, and the role of the nipple within the fuel delivery system on nitro models.

When inspecting the part, check for thread integrity, internal blockage, and any signs of wear. Replace the nipple during a full carb rebuild or when fuel leakage or irregular flow is detected. Keep the component clean to avoid introducing contaminants into the carburettor.

Installation requires clean mating surfaces, hand-starting the thread to avoid cross-threading, and tightening to a secure but not excessive torque. After installation, conduct a static fuel test and a bench tuning session before returning the engine to the model.

Regarding compatibility, using O.S. specified carburettor components helps guarantee correct sealing and thread engagement; a degraded nipple can affect fuel delivery and tuning stability, so swap suspect items as part of routine maintenance.