If so it probably only has an idle mix adjust, or an idle speed screw, or neither.
There is a way to adjust the full governed speed, but that's best left alone unless there is good reason to go there, as in the engine has been apart or something happened to the original setting.
Common carb problem with those is lean surging from dried ethanol deposits in the main jet. The solution is to remove the jet, which I think is in the nut that holds the bowl on, but it can be up inside the stem above the bowl nut. It will need to be scraped out with a stiff wire, flushing with carb cleaner will not clean it! Be persistent, scrape and poke it as thoroughly as possible without actually enlarging it.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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