O.S. Engine OS72107430 Exhaust Silencer C Ring and Spring Replacement  [OS72107430]

Overview of C Ring and Spring Role

The O.S. Engine OS72107430 replacement C ring and spring are supplied for use with silencer assemblies on model engines. These components act as the mechanical fasteners that secure the silencer to the pipe, maintain correct alignment at the joint, and prevent the connection from loosening during operation.

These parts are aimed at silencer and pipe junctions in general rather than matching a specific chassis, so inspect your existing mounting features to confirm compatibility prior to fitting. Typical causes for renewal include ring deformation, spring fatigue, or corrosion that can permit exhaust leakage or allow the silencer to move.

Fitting is done by removing the silencer assembly, removing the worn ring and spring, seating the new C ring in the groove and placing the spring over the mount, then reassembling so the joint sits flush. After installation, verify secure seating at idle and when under load to ensure there are no leaks or movement.

Regular maintenance inspections should look for cracking, corrosion, or reduced spring force and replace the components if any deterioration is evident to maintain consistent exhaust sealing and avoid rattling.