50ST Carburetor Insulator Spacer YSS1022 for Tuning by YS Engine  [YSS1022]

Insulator designed to support tuning stability

The YS Engine YSS1022 carburetor insulator is supplied as a replacement spacer for 50ST-series RC nitro engines. Its primary role is to isolate the carburetor flange from the engine body and help maintain consistent mounting geometry during setup and runs.

Compatibility note: this item is specified for 50ST use; verify against your engine parts list before assuming cross-fit. Fitting requires removal of the carburetor from the flange and careful reassembly, following the engine maker's torque guidance for mounting screws.

Tuning impact: by limiting heat transfer and preserving a stable mounting interface, the insulator can contribute to repeatable idle and needle adjustments. When installing, check gasket surfaces and fastener threads for wear and clean mating faces to ensure a reliable seal.