I really don’t get all the fuss about running down OEM parts? In my experience, Nikki carbs are typically throw aways when they fail (definitely after they have sat unused with gas in them for a long time) and even a Walbro will eventually wear out. For all the time spent here, just plugging in the model number from the engine into the “interweb” will yield some exploded views of the engine and part/make-model numbers of which can be easil and quickly cross referenced. Yes, people hate the Chinesium carbs, but I just buy them Amazon Prime. I have found that if they are bad, they are almost always bad right out of the box. If I get a bad one, I just send it back and order another one, I think I have probably bought 10 of them this way over the years and I only had to send back two; in both of those cases, the second carbs were good to go. I have found that, as long as I drain the fuel before storing them for the winter, I get perfectly good service from them for at least long enough that I feel like I have “gotten my money’s worth out of them”, which for me is 3-5 years or longer. If they fail after that, I shrug my shoulders and order another one off AP. I guess I am just the type of personality that can’t stand calling around talking to people, getting no or bad information from them, or hitting dead ends when they don’t know how or don’t want to be bothered to help. I just want to find the cheapest part as quickly as possible and move on with the project! I also know from other past projects that even going to “legitimate“ parts sources can still yield you Chinese aftermarket parts anyway when OEMs discontinue parts for older machines and parts suppliers fall back on secondary sources. I once ordered a shift knob from a Jeep dealer. When it arrived, it was a HELP! branded part, like you get at the chain auto parts stores.