Brief update. The spark plugs turned out to be NGK BR7HS. I replaced them with NGK BR6HS, and it runs WAY smoother. Still the same problem though. Pulled the carb apart, found junk under the welch plug and a corroded needle (I attached pics. Currently I got the carb soaking in a pine sol bath, currently just shy of 48 hrs. I’m going to neutralize the acid, rinse thoroughly and use compressed air to dry, a toothbrush and small wires to make sure everything is clean.
A quick question about the needle valve retainer. I have tried a fish hook, a curved wire, I am unable to pull anything out. I tried to look down the hole, couldn’t see anything, but it is tough to look down there. I think that there isn’t one in there, but I can’t 100% say that. Does anyone have any easy tips for confirming if there is one down there? Or a different way to get it out? I don’t have access to dental tools.
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