O.S. Engine OS40960300 valve spring seat FS-95V replacement part for RC engines  [OS40960300]

Valve spring seat overview

This O.S. Engine OS40960300 valve spring seat is an RC-scale replacement part listed specifically for the FS-95V designation and intended for use in RC engine maintenance and rebuilds. The text focuses on practical fitment and role rather than performance claims.

Compatibility centers on the FS-95V identifier shown in the product name; installers should confirm the part number against their engine or service manual before fitting. The seat provides the mounting interface between the valve spring and the cylinder head assembly in the engine's valve train, serving a straightforward mechanical role during routine servicing.

When replacing the valve spring seat, inspect surrounding components such as valve keepers, valve springs, and guides for wear. Proper seating and clean contact surfaces help maintain valve timing geometry and reduce the chance of binding during tuning sessions, rebuilds, or after competitive use on RC tracks.