Bonjour,
What a great moment, just out of its box, it runs perfectly.
Please note: the user guide describes an engine with a carburetor; this is a mistake.
The setting I found for the gasoline I use (2-stroke alkylate gasoline) is to open the needle valve between 1/2 and 3/4 of a turn.
Thank you Jin 
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Hi Raphael, I am so glad you are happy with your Monitor engine!
What number is yours?
Gil