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

Why the silencer o-ring matters

This O.S. Engine OS29122540 silencer gasket o-ring is a replacement seal intended for silencer and muffler assemblies on nitro RC engines. It stops exhaust from leaking at connection points, helping preserve correct idle and throttle response.

For fitting: remove the silencer, clean mating faces of soot and residue, seat the o-ring into the groove or against the mating face, and reassemble with the original fixings. Confirm the o-ring is not twisted and sits evenly to maintain a uniform seal.

Performance note: a worn or flattened o-ring allows exhaust blow-by, which can disturb idle stability and change needle settings. Replacing this gasket o-ring during routine maintenance supports consistent exhaust pressure and predictable engine behavior while tuning or running.

Packing includes

• 1 pcs silencer gasket o-ring.