OLD-10 Carburettor Needle Valve Compatible with OLD-10A and OLD-10D - O.S. Engine OS21285900  [OS21285900]

OLD-10 series needle valve details

This needle valve assembly is an RC-scale carburettor replacement designed for the OLD-10A and OLD-10D carburettors. It serves as the metering component that allows you to refine fuel delivery while performing maintenance or tuning on nitro RC engines.

Compatibility is limited to the stated carburettor models, so check your carburettor type prior to ordering. In operation the unit supplies the adjustable needle interface used to set idle and part-throttle mixtures; installing a new assembly recovers sharp needle response without replacing other carburettor parts.

Installation is routine for those comfortable with carburettor servicing: remove the carburettor top, extract the old needle assembly, and fit the new unit with careful seating, then perform light idle and throttle checks. Make conservative adjustments during tuning and evaluate engine behavior in a suitable outdoor area for nitro RC use.