50x O-Rings for YS Engine Carburetors - YSS1021  [YSS1021]

O-ring replacement set for RC engine carburetors

This is an RC-scale replacement O-ring kit listed as YS Engine part number YSS1021, supplied as fifty rings to support regular carburetor servicing and spare parts stock. The set is designed for YS Engine carburetors and similar RC carburetor assemblies where standard O-ring seals are used.

O-rings provide sealing at needle valves, float needles, and other carburetor joints to prevent fuel leaks and air ingress that can destabilize idling and throttle response on glow engines. Routine replacement of aged or hardened rings ensures consistent fuel flow during tuning and running sessions.

Installation is straightforward: remove the relevant carburetor piece carefully, observe the O-ring groove alignment, replace the old ring with a fresh one from the 50-piece kit, and reassemble using correct torque to avoid pinching the new seal. Verify proper seating and conduct a low-idle leak check before normal operation.

Tips from the field: keep labelled spare rings in your toolkit, swap out rings that show cracking or flattening, and store the remaining O-rings away from heat, sunlight and strong solvents to keep them supple. The 50 count covers several maintenance intervals.