start without choke, fouling of plugs, carbon buildup all point to a rich carb setting-and you have the "sealed" jet carb that can"t be adjusted. The Ethanol mix you"ve been experimenting with has "leaned" your fuel mix enough that it has gotten to what the carb should have been originally- ethanol is a "oxygenate" from the OH radical replacing a H ion in the carbon chain. SOME sealed carbs were set for sea level jetting, tested in a near Washington DC EPA lab and passed- get up 1000 foot above sea level and a bit rich. That seems to be what you have, you"ve got a working fix, may as well continue. RN
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Today's Featured Article - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
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