S42 and GT22 Cover Gasket OS28214000 for O.S. Engine  [OS28214000]

Seal Gasket for S42 and GT22 Engine Covers

This O.S. Engine cover gasket, catalog number OS28214000, is a direct replacement sealing part for S42 and GT22 engine covers. It fits between the cover and the crankcase to preserve internal compression and stop fuel or crankcase leaks during running and bench servicing.

Fitting is suitable for hobby workshop use: clean mating faces of any old gasket residue, align the gasket to the cover ports, then refit the cover screws while following the engine maker's published tightening sequence and torque values. Avoid overtightening fasteners and inspect the gasket surface for creases or damage before final assembly.

During regular maintenance a sound gasket helps keep compression steady and running behavior predictable on nitro RC models. If you observe seepage, oil pooling, or reduced compression, replace the OS28214000 gasket and recheck engine settings on the bench rather than immediately changing carburetion.