O.S. Engine OS27216100 Disc Valve Pin for 61VR and 65VR Engines, carburettor part  [OS27216100]

Disc valve pin for 61VR/65VR

This O.S. Engine disc valve pin is an RC-scale carburettor component intended for direct replacement in engines labeled 61VR and 65VR. It serves as the central pin in the disc valve assembly and should be used when the original pin shows wear or if disc valve movement is inconsistent.

Compatibility is limited to the engine models indicated in the product name, verify model stamping before installation. During replacement, confirm the disc valve plate sits flush and that the pin aligns concentrically to avoid binding. Inspect surrounding bore and mating surfaces for wear and clean debris from the cavity before fitting.

In tuning context, a correctly seated disc valve pin contributes to predictable throttle response and smoother transition across the RPM range by allowing the disc valve to open and close without lateral play. Use it as part of routine maintenance or when diagnosing irregular idle or throttle hesitation linked to the disc valve area.