O.S. Engine OS44981200 Replacement Carburettor Rotor 60Y FSa-110  [OS44981200]

What the rotor does and fit notes

The O.S. Engine OS44981200 rotor is a dedicated replacement part designed to sit inside a model engine carburettor and regulate airflow by rotating with the throttle mechanism. It is supplied as a single component for service or tuning duties.

Check that the rotor profile matches the internal geometry of your carburettor body and that the shaft interface aligns with the existing assembly before purchase. Because this is the rotor only, you will need to remove and partly disassemble the carburettor to install it. Keep tiny components like shims and retaining clips safe while you work.

From a tuning perspective the rotor can alter airflow distribution and therefore impact idle stability and mid range response. Slight variations in how the rotor sits after reassembly can affect mixture, so complete a test run and adjust the high and low needles to suit current weather and engine condition.

This spare rotor is for enthusiasts and technicians who service model engines and need a component level option for repairs and tuning adjustments.