O.S. Engine OS72107430 Silencer C Ring & Spring Kit  [OS72107430]

Silencer Fastener Kit: C Ring and Spring

The O.S. Engine OS72107430 component set provides a replacement C ring and spring for silencer assemblies on model engines. These small parts act as the retention system that couples the silencer to the exhaust pipe, preserving alignment and preventing loosening while the engine runs.

Because fitment applies to the junction between silencer and pipe rather than a particular chassis, inspect the mating faces and mounting features before installation to ensure compatible fit. Replacement is common when the original ring bends, the spring loses tension, or corrosion compromises the joint seal.

To install, remove the silencer, take out the old ring and spring, seat the new C ring in the silencer groove and place the spring around the mount, then reassemble making sure the joint sits flush. Verify that the silencer remains firmly located at idle and under load after completing the job.

Regular checks for cracking, rust, or diminished spring action will help avoid exhaust leaks and prevent the silencer from shifting or rattling during operation.