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

Universal Carburettor Nipple No.12

This is an RC-scale carburettor nipple intended as a service replacement for glow-engine fuel systems. The part is designed as a universal connection point for fuel tubing on small nitro engines and focuses on reliable hose seating and straightforward installation without altering carburettor function.

Installation is procedural: remove the old nipple from the carburettor vent or fuel port, confirm hose ID matches the nipple seating, then push the fuel line onto the nipple until it seats securely. Use a short length of heat-shrink or a small clamp if your setup requires extra retention; avoid excessive force that could deform the carburettor housing.

For tuning and maintenance, this nipple serves mainly to maintain a clean, consistent junction for fuel delivery and to reduce hose kinks near the carburettor. Inspect the connection regularly for fuel seepage and replace the nipple if the seating becomes worn or the fuel line slips under normal operating vibration.

Because this is described as a universal item, confirm fitment by visual check and trial fit on your carburettor before final assembly; do not modify the engine or carburettor body to force a fit. Always treat the component as an RC-scale accessory and keep all work confined to model engines only.