YS Engine YSS7143 Carburetor Nipple - Spare for RC Engines 61 80 91  [YSS7143]

Compatibility and fit notes for YS Engine carbs

This YS Engine YSS7143 item is an RC-scale nipple provided as a replacement for glow and small nitro engine fuel assemblies. It is intended for part replacement when the feed or mounting nipple shows wear or allows leakage.

Compatibility notes: presented as a YS Engine spare component. Prior to fitting, visually check the YSS7143 marking and ensure the thread size, pitch, and seating face match your carburetor or engine mounting point. Consult the original equipment parts list where necessary to confirm fit.

Installation guidance: remove fuel from the workspace and cool the engine. Extract the old nipple, clean the mating surfaces, hand-start the new nipple to prevent cross-threading, tighten to a snug fit without overtightening, and inspect for fuel seepage. Conduct a short supervised run to confirm steady idle and acceptable fuel flow, then tweak needle settings gradually if needed.

Tuning role: though a small part, the nipple ensures a consistent seal at the carburetor interface and supports predictable idling and throttle response while you carry out jetting or needle tuning.