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

Replacement head gasket for FS-120S

This head gasket is an RC-scale replacement part intended for use with FS-120S engine assemblies. It is designed to restore a sealed interface between the cylinder head and crankcase during routine engine servicing or rebuilds. The description here refers specifically to the OS45514022 part designation and the FS-120S model name embedded in it.

Fit and compatibility are determined by the FS-120S reference in the part number. Confirm your engine is an FS-120S before ordering, since OS45514022 is sized for that family of RC glow engines. Do not use this gasket on non-RC or full-size engines.

Installation is straightforward for hobbyists familiar with basic engine maintenance: remove the head, check mating surfaces for warpage or residue, fit the OS45514022 gasket, and reassemble. Use correct sealing practice, replace the gasket whenever the head is removed to preserve compression, and avoid over-torquing fasteners while following your engine's service schedule.

For tuning and everyday running the gasket plays a supportive role: a reliable seal helps keep compression steady and promotes predictable engine response, aiding consistent tuning and on-track performance. Keep spare OS45514022 gaskets on hand as an inexpensive way to reduce downtime during maintenance.