O.S. Engine OS40960100 Valve FS-95V Replacement for FS-series Engines  [OS40960100]

FS-95V Replacement Valve Overview

The FS-95V valve is supplied as O.S. Engine part number OS40960100 and is intended for FS-series glow engines commonly used in RC aircraft and related models. The component is a valve assembly featuring a precision ground steel stem, produced to serve as a direct service replacement.

Compatibility covers FS-series O.S. glow engines that use the FS-95V valve type; confirm fitment against the engine's official parts list since this description does not itemize every eligible model beyond the FS-series classification.

Installation notes: remove the cylinder head and valve train per the manufacturer's service manual, fit the replacement valve, check valve seat contact and clearance, then reassemble. Conduct a careful bench run to ensure sealing and idle performance. Do not force parts into place; correct seating and clearance are vital.

Tuning perspective: replacing a worn valve restores compression and a stable idle, which supports consistent carburetor needle settings and predictable running, though the valve itself does not alter ignition or carburetion settings directly. Periodic inspection of the valve face and stem will help avoid gradual performance loss.