Upgrade Needle Spring for G200PU-EI Carburettor K149181161 by Zenoah  [K149181161]

G200PU-EI Needle Spring Replacement

This Zenoah K149181161 needle spring is supplied as a replacement for G200PU-EI carburettors, intended to restore correct needle seating pressure and improve idle stability.

To fit the spring, remove the carburettor from the model, access the needle assembly and replace the worn spring with the K149181161 unit while keeping needle orientation unchanged. Reassemble the carb, bench-check throttle movement and then make measured needle and idle adjustments on a secure test stand before running the engine.

Because the spring sets seating force, swapping it can influence mid-throttle behaviour and idle metering. Use the replacement as part of routine maintenance or when symptoms indicate spring fatigue, and clean the carb thoroughly during the service for best performance.