I was dragging the pasture, to level mole mounds, and break up the cow patties, yesterday, and the CA started running poor, like starving for gas. I nursed it back to the shop, and found rust in the sediment bowl. I cleaned the bowl, and removed the carb. I tore the carb (ZENETH) apart, stripped it down to cast iron, and dropped it in the card cleaner bucket, to soak till this morning. I pulled it out of the cleaner this morning, rodded the passages out, with my torch tool, blew it out with air, and started reasembly. I had a brass jet left over on the bench, and couldn't figgure out where I took it out at. I seperated the halves again, and looked it over carefully, but after an hour I still couldn't figgure it out! I went in to the computer, and looked for a PDF breakdown of the carb, but couldn't find one. I had lunch, drank coffee, and generaly dreaded going back to the project.Back at the bench I spotted a hex plug on the bowl bottom, that I had removed to soak it. I turned it up removed the plug, and then It dawned on me that I had removed the jet, from inside that passage. I screwed it in , reassembled the carb, put the carb back on the tractor, and it ran fine, BUT I didn't have much day left to go back to the dragging. There is not much get's by me!