YS Engine YSS1021 Carburetor Seal Pack (50pcs)  [YSS1021]

Bulk O-ring pack for carburetor servicing

This RC replacement O-ring pack is listed under YS Engine part number YSS1021 and contains fifty rings for ongoing carburetor servicing and spare holdings. It suits YS Engine carburetors and other comparable RC carburetor units that use standard O-ring seals.

O-rings provide a sealing function at needle valves, float needles and various carburetor joints to prevent fuel leaks and air ingress that can compromise idling stability and throttle response on glow engines. Replacing aged or hardened rings is a routine maintenance item to keep fuel delivery predictable during tuning.

To fit: disassemble the carburetor section carefully, note the O-ring orientation in its groove, remove the old ring and replace with a new one from the 50pcs pack, then reassemble using the correct torque to prevent seal pinching. Inspect the seating and perform a low-idle leak check before full operation.

Helpful hints: keep a selection of labelled rings in your field toolbox, replace any showing cuts or flattening, and store the rest away from sunlight and aggressive chemicals to maintain flexibility. The fifty-piece quantity covers multiple maintenance cycles.