YS Engine YSS1041 Regulator O-ring Pack 50pcs fuel system spare  [YSS1041]

Regulator O-ring pack

This 50pcs O-ring pack is a small but essential spare for nitro RC engine fuel systems, intended for sealing regulator and carburettor interfaces on RC-scale models.

O-rings prevent fuel leaks and help maintain stable fuel pressure at the regulator, which supports consistent idle and throttle response during tuning. Keep O-rings clean and replace any that show cuts, flattening, or hardening to avoid fuel delivery issues.

When replacing, seat each ring evenly in its groove and verify smooth movement of valve parts before reassembly. Store spare rings dry and away from direct sunlight to preserve elastomer life.