Needle Spring for G200PU-EI Carb - K149181161 Zenoah  [K149181161]

G200PU-EI Needle Spring Swap Guide

This Zenoah K149181161 needle spring replaces the worn spring in G200PU-EI carburettors to recover seating force and help stabilise idle and transient throttle behaviour.

Swap procedures are straightforward for experienced hobbyists: remove the carburettor, access the needle assembly, replace the existing spring with the K149181161 item while preserving needle orientation, then reassemble and perform a bench throttle check before reinstalling on the engine. Trim and tune idle with small adjustments on a safe test stand.

The spring plays a targeted role in tuning by changing needle seating force and thus affecting mid and idle fuel metering. Use this part when you notice inconsistent idling or weakened spring tension and follow up with a full carb service for best outcomes.