YS Engine YSS1021 Carburetor O-Ring Set 50pcs  [YSS1021]

Replacement O-rings for RC carburetors

This RC-scale replacement O-ring set is supplied under YS Engine part number YSS1021 and comes as 50pcs to support routine carburetor maintenance and spare inventory. The kit is intended for use with YS Engine carburetors and compatible like-for-like RC carburetor assemblies where standard O-ring seals are required.

O-rings act as seals at needle valves, float needles, and other carburetor joints to stop fuel seepage and air ingress that can upset idling and throttle response on glow engines. Replacing hardened or flattened rings is a standard maintenance task to maintain steady fuel delivery during tuning and running sessions.

Fitting is simple: carefully disassemble the carburetor component, note groove orientation, remove the worn ring and fit a new one from the 50pcs set, then reassemble using correct screw torque to avoid pinching the seal. Check seating and run a low-idle leak test before full operation.

Practical advice: label some spare rings in your field kit, replace any showing cracks or flattening, and store the remaining O-rings out of direct sunlight and away from harsh solvents to preserve elasticity. The 50pcs quantity supplies multiple maintenance cycles so you do not need to reorder immediately.