50-Pack YS Engine YSS1041 Buna-N O-rings for Fuel Regulator  [YSS1041]

Fuel System O-ring Set

This 50-piece set provides spare O-rings for nitro RC fuel systems, intended to seal regulator and carburettor joints on scale models and hobby engines.

Proper O-rings prevent leaks and help maintain stable regulator pressure, which supports smooth idling and throttle response when fine tuning. Discard any rings showing nicks, compression set, or brittleness to avoid fuel issues.

Fit each ring so it sits flush in the groove and check that moving parts operate freely before final assembly. Keep unused rings in a cool, dry place away from sunlight to extend lifespan.