O.S. Engines O-Ring (S-16) #21921800

The O.S. Engines O-Ring S-16, part # 21921800, is a genuine OEM replacement seal for compatible O.S. nitro engine applications.

Replacing worn, flattened, cracked, or damaged O-rings helps maintain proper sealing and can prevent air leaks, fuel seepage, and inconsistent engine behavior. Small sealing components can have a major effect on idle quality, tuning stability, and overall reliability, making fresh O-rings an important part of regular nitro engine maintenance.

This genuine O.S. replacement part is ideal for rebuilds, carburetor service, preventative maintenance, and restoring proper sealing in compatible applications.

Key features

-Genuine O.S. Engines replacement part

-O-Ring(S-16)

-Part # 21921800

-OEM fit for compatible O.S. applications

-Helps maintain proper sealing

-Useful for rebuilds and preventative maintenance

-Helps reduce the risk of air leaks and fuel seepage

Free ground shipping on orders over $50.