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

Compression and Sealing for S42 and GT22 Covers

This O.S. Engine cover gasket, reference OS28214000, is an aftermarket replacement for S42 and GT22 covers that provides the sealing interface to protect crankcase compression and prevent fuel or oil seepage during running and bench work.

Fitment is friendly to enthusiasts: clear away old gasket material, align the OS28214000 to the cover ports, then tighten the cover screws in the specified pattern and torque given in the engine manual. Take care not to overtighten and check the gasket for folds or damage before completing assembly.

A correctly sealed cover contributes to stable running and predictable throttle response on nitro RC engines. If you notice oil at the joint, inconsistent compression, or degraded running in bench tests, replace the gasket and then validate engine settings rather than immediately changing jetting.