WEN 4050 Generator, a new carb and load/ test run.
After cleaning the original carb 3 different times this unit still wouldn't preform as it should under a load where it acted as though it was running lean and hunting to maintain the rpm's.
The decision was made to replace the carb with a new one which too just shy of 3 weeks to receive.
With new carb installed the unit load tested and ran fine, it is now back with it's owner.