FS-120S/FS-120S-E Gasket Replacement OS45514010 - O.S. Engine  [OS45514010]

FS-120S series gasket repair kit

This O.S. Engine gasket set is a compact replacement kit made to renew sealing surfaces on the FS-120S and FS-120S-E RC engines. It is intended for routine service work to eliminate fuel leaks and maintain compression without changing the engine's rated performance.

Fitting is standard practice: remove the head or crankcase parts that require attention, lift out old or damaged gaskets, fit the matching parts from the set, and reassemble using correct torque on the fasteners. Always check and clean mating faces to remove burrs and old gasket residue prior to installing new seals.

In maintenance and tuning routines, fresh gaskets restore consistent running rather than improving power. Replace this set when you suspect compression loss, notice fuel seepage at joints, or after engine disassembly for piston or cylinder work.