Here’s the carb, it’s not the typical outboard carb. I believe that it is related to some sort of chainsaw carb. The low speed needle is marked with an L in the casting. There is no packing, so a bit of gas ends up outside the needle on top of the carb and the spring keeps it in place. Once coughing and shutting off, the plug appears mostly dry. I also attached a picture of the low speed needle. I am not sure what it is supposed to look like, but I assume that it should taper down like most needles.