O.S. Engine OS21481950 Universal Nipple No.12 for RC Carburettor Fuel Lines  [OS21481950]

Compact Carburettor Nipple No.12

This component is an RC-scale carburettor nipple intended as a service replacement for glow-engine fuel systems. It acts as a universal connection point for fuel tubing on small nitro engines, designed to give consistent hose seating and straightforward installation without altering carburettor performance.

To fit the part, remove the existing nipple from the carburettor vent or fuel port, check that the hose inner diameter matches the nipple seating, and then push the fuel line onto the nipple until it seats securely. Where additional retention is required, use a short piece of heat-shrink or a small clamp, but avoid excessive force that could damage the carburettor housing.

For maintenance and tuning this nipple helps preserve a clean junction for fuel delivery and reduces kinks near the carburettor. Inspect the connection regularly for signs of seepage and replace the nipple if the seating becomes worn or the hose slips with normal vibration.

Given its universal designation, confirm compatibility via a visual check and trial fit on your carburettor before completing assembly; do not modify the engine or carburettor body to achieve a fit. Handle the component as an accessory for model engines only.