YS Engine YSS1021 50-Piece Carburetor O-Ring Kit  [YSS1021]

Sealing O-rings for RC carburetor maintenance

This RC replacement O-ring set carries YS Engine part number YSS1021 and is shipped as fifty pieces to assist with ongoing carburetor maintenance and spare part storage. It is suitable for YS Engine carburetors and other like-for-like RC carburetor units that use standard O-ring seals.

O-rings function as seals at locations such as needle valves and float needles to stop fuel seepage and unwanted air entry that can upset idle quality and throttle feel on glow engines. Regular replacement of old, hardened, or flattened rings helps maintain predictable fuel delivery while tuning and running the engine.

Fitting guidance: carefully disassemble the carburetor component, note the correct groove orientation, remove the worn ring and replace with a new one from the 50-piece set, then reassemble with appropriate screw torque to avoid pinching the seal. Confirm seating and test at low idle for leaks before full-throttle use.

Practical maintenance notes: keep a few labelled rings in your field kit, discard rings showing cuts or deformation, and store remaining O-rings away from sunlight and aggressive solvents to preserve elasticity. The 50-piece count provides spares for multiple sessions.