O.S. Engine OS45514010 FS-120S FS-120S-E Gasket Service Kit  [OS45514010]

Service gasket kit for FS-120S family

This O.S. Engine gasket set is supplied as a compact replacement kit to restore sealing faces on FS-120S and FS-120S-E RC engines. It is aimed at maintenance tasks to stop fuel leaks and recover compression without altering factory performance figures.

Installation follows normal glow-engine procedure: disassemble the head or crankcase sections needing attention, clean mating faces thoroughly, remove remnants of old gaskets, fit the correct new pieces from the set, and reassemble with appropriate torque on engine fasteners. Proper surface preparation is essential for a reliable seal.

Gaskets are a routine service item rather than a performance upgrade; replace them when you encounter fuel seepage, loss of compression, or whenever the engine has been taken apart for repairs or piston and cylinder work to preserve consistent running.