O.S. Engine 702P OS22025619 Exhaust Mount Screw  [OS22025619]

Tuning-ready exhaust fastener

The O.S. Engine OS22025619 screw is a single, threaded mounting component used to secure mufflers and exhaust brackets on nitro and small-scale gas engines. It provides a fixed attachment point where muffler alignment and orientation are important during setup.

To install, line up the muffler flange with the engine outlet or bracket, insert the screw through the mount, and tighten to a secure feel. Do not over-torque, as excessive force can damage the engine mounting boss or the muffler flange holes. Basic drivers and hand tools are adequate for fitting and removal.

During tuning sessions this screw helps maintain the intended exhaust position; verify tightness after adjustments and after several runs to avoid drift caused by vibration or temperature changes.