YS Engine YSF2188 insulator o-ring for DZ140 and DZ160 RC engines  [YSF2188]

Insulator O-ring for DZ140/DZ160

This insulator o-ring is a direct replacement spare designed for YS Engine DZ140 and DZ160 model engines. It functions as an insulating seal at the engine's mounting or cylinder head interface to help maintain proper isolation between metal parts and prevent leak paths that affect engine performance.

Compatibility is limited to the DZ140 and DZ160 engine series; confirm the engine model before ordering. The part is intended for model-scale RC engine service and maintenance, not for full-size engines or non-model applications.

Installation notes: remove the engine mount or cylinder head as required, inspect mating surfaces for wear or residue, seat the o-ring in its groove before reassembly, and tighten hardware to the engine manufacturer's torque recommendations. Use of appropriate assembly tools and thread locking compound where specified by the engine manual is recommended to avoid damage during reassembly.

Tuning and maintenance role: this o-ring helps preserve vacuum and sealing integrity in the engine assembly. Replace the insulator o-ring when signs of flattening, cracking, or permanent deformation are visible, or during scheduled engine servicing to maintain consistent engine behavior.