Replacement Silencer Gasket O-Ring - O.S. Engine OS29122540  [OS29122540]

Function and correct seating

The O.S. Engine OS29122540 silencer gasket o-ring is an aftermarket replacement part made to seal silencer and muffler joints on nitro RC engines. It prevents exhaust gas escaping at connection points, which can otherwise affect idling and throttle consistency.

Fitting is simple for most hobbyists: detach the silencer, clean the contact surfaces from carbon or oil, position the o-ring into the gasket groove or mating face, then refit using the original screws or bolts. Verify the o-ring is seated evenly and not twisted to avoid localized leaks.

Service advice: a compromised o-ring will let exhaust blow past the joint and can make needle adjustments unpredictable. Swapping the gasket o-ring during routine checks keeps exhaust back-pressure stable for consistent engine performance.

Packing includes

• 1 pcs silencer gasket o-ring.