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I just run the premium because i wanted a good grade of gas and the closest gas station only has 93 for premium. Don't notice any difference in performance, just don't want to run any cheap gas in it. Also i use Star Tron gas stabilized in all my small engines.
Not too worried about the gas just want to make sure i am not too lean and hurt the engine, I have not changed any of the stock carb setting and it runs fine on what looks to be a genuine Keihin carb from Japan, I remember some post saying the 2020 Brozz carb ran good out the box, just wanting to make sure its not too lean.
What is making think it is too lean is that i always have use a full choke no matter what the temperature is outside, and have to run it for about a minute before it will idle with the choke off. I have my idle set at 1500 rpms
Also saw some posts about adjusting the airflow mixture but not sure if that would be enough either.
Once again not worried about performance just dont want to run a too lean engine
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