I would start in the carb. A lean condition will pop and backfire through the carb. Your comment about the choke is a tell tale sign that its fuel or the lack of. You might see some grey or light smoke running lean, but it will be black when its too rich. Run the fuel out of the carb and allow the unit to cool. Then you can try a can of gumout carb cleaner, take off the pipe plug on the side of the bowl housing and spray in the carb cleaner until the bowl is full. Replace the plug and turn on the fuel. This will run some of the cleaner into the passages and may clear out whats in there. You may still need to tear it down, but its a start on diagnostics.
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Today's Featured Article - Sunday Drives - by Cowboy. Summer was finally upon us here in Northern Maine. We have two types of industry up here, one being "Forestry" (Wood Products) and the other "Farming" (Potatoes). There is no shortage of farm tractors and equipment around here! I have been restoring old Farm Tractors for the past 6 years, and have found it easier and less expensive to hit all the auctions and purchase whole tractors for parts needed. My wife who works at a local school, and only has weekends and summers off, while on t
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