YS Engine YSS1041 50pcs Buna-N Regulator O-rings - Fuel System Spares  [YSS1041]

Replacement O-rings for Regulators

The 50 O-rings in this pack act as small but important spares for nitro RC fuel systems, used to seal regulator and carburettor interfaces on model engines.

Good condition O-rings prevent fuel seepage and preserve regulator pressure stability, contributing to reliable idle and throttle control during setup and tuning. Replace any rings that have cuts, permanent deformation, or have become hard to avoid performance problems.

During replacement, ensure each ring sits evenly in its groove and that valve components move freely before reassembling. Store unopened rings away from heat and sunlight to protect the elastomer properties.