YS Engine YSS7143 Nipple 61 80 91 RC spare nipples  [YSS7143]

Engine nipple spare for RC engines

This YS Engine YSS7143 item is an RC-scale nipple used as a replacement spare for glow and small nitro engine fuel systems. The part is intended for routine maintenance and parts replacement where the feed or mounting nipple shows wear or leakage. The description focuses on practical fit, installation basics, and how the nipple affects fuel delivery and tuning.

Compatibility notes: the item is presented as a YS Engine spare component. Before replacing, match the part visually to the existing nipple and confirm thread and seating fit on your carburetor or engine mounting point. If in doubt, compare the YSS7143 marking or consult the original equipment parts list for your YS Engine model.

Installation guidance: remove fuel from the area and work with the engine cool, remove the old nipple, clean mating faces, hand-start the new nipple to avoid cross-threading, tighten snugly without overtightening, and check for fuel leaks before full operation. After installation, run the engine briefly under supervised conditions to confirm steady idle and fuel flow, and make incremental adjustments to needle settings if necessary.

Tuning role: the nipple itself is a small consumable part but plays a direct role in maintaining consistent fuel delivery and sealing at the carburetor interface, which supports predictable idling and throttle response when performing jetting or needle adjustments.