O.S. Engine OS29122540 Silencer Gasket O-Ring for RC Silencer Assemblies  [OS29122540]

Silencer gasket role and fit

This O.S. Engine OS29122540 silencer gasket o-ring is an RC-scale replacement seal designed for use in silencer/muffler assemblies on nitro RC engines. It functions as the primary sealing element between the silencer and the engine or between silencer components, preventing exhaust leaks that can affect idle and throttle response.

Installation is straightforward for hobbyists: remove the silencer, inspect the mating surfaces for carbon build-up or damage, seat the o-ring in the gasket groove or mating face, and reassemble using the original fasteners. Ensure the mating faces are clean and that the o-ring is not twisted during installation to maintain an even seal.

Tuning and maintenance notes: a worn or flattened o-ring will allow exhaust blow-by, which can cause inconsistent idle, reduced throttle response, and erratic needle adjustments. Replacing the gasket o-ring as part of routine engine maintenance helps preserve consistent exhaust back-pressure and predictable engine behavior during track sessions or bashing.

Packing includes

• 1 pcs silencer gasket o-ring.