FS-120S Head Gasket OS45514022 - O.S. Engine  [OS45514022]

FS-120S gasket replacement

This gasket is a purpose-made RC replacement for FS-120S engine assemblies and restores the sealing plane between cylinder head and crankcase. The part is identified by the OS45514022 code and is intended for use with FS-120S models.

Compatibility depends on the FS-120S designation in the part number. Verify that your engine is an FS-120S prior to ordering since OS45514022 is tailored to that series of glow engines. It is not suitable for non-RC or road/industrial engines.

Fitting is a routine workshop task for those who perform engine servicing: detach the head, clean and inspect mating faces for distortion or debris, fit the OS45514022 gasket, and reassemble. Follow correct sealing technique, avoid excessive torque on head bolts, and replace the gasket when the head is removed to retain compression integrity.

When setting up the engine for reliable running, a consistent head seal contributes to steady compression and predictable response, which supports tuning and repeatable performance. Keeping OS45514022 spares reduces the chance of extended downtime during repairs or rebuilds.