O.S. Engine OS44850000 Intake Valve for FS Series Engines  [OS44850000]

Replacement intake valve for FS engines

This O.S. Engine intake valve OS44850000 (FSa-81) is supplied as a single replacement component for FS-series model engines. It serves as the intake-side valve in the engine induction system and is intended for maintenance and part swaps on small model engines.

Follow the engine maker's service procedure when installing. Remove the cylinder head as described in your engine manual, check the valve seat and retainer for wear, fit the new valve, and reassemble while observing the specified clearance and torque figures. If you are not confident, have an experienced model engine technician perform the work.

From a tuning and service viewpoint, a correctly seated intake valve ensures reliable sealing and predictable throttle response. Regular inspection helps maintain consistent mixture delivery and prevents premature wear in model engines.