FS-series Precision Intake Manifold OS44868000 FSa-81 for RC Engines by O.S. Engine  [OS44868000]

Intake Manifold for FS-series Engines

This RC intake manifold is built as a replacement for O.S. Engine FSa-81 type units used on FS-series model engines. It connects the carburettor or intake assembly to the engine intake port and provides a consistent sealing face suitable for hobby engine applications.

Fitting is typically carried out on compatible FS-style housings: detach the carburettor, carefully align the manifold flange to the engine intake, and secure with the original fasteners to ensure a correct seal. Always inspect the gasket and renew if required to avoid air ingress that can upset idle and throttle behaviour.

In tuning scenarios the manifold affects how air enters the engine and can influence throttle response and mid-range characteristics on glow-powered RC engines. Installing a correct replacement helps regain steady idle and simplifies repeatable adjustments during bench or track tuning. This item is intended only for RC model use.