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Lyle, my obvious guesses are first fuel starvation followed by ignition, but Im thinking more fuel starvation from what you described. Other minor problems could be the gas tanks not getting air into it, is the cap okay and would removing it make things better??? Is there a vacuum or air sound when you remove it??? If it has a sediment bowl it or its inlet screen mesh (if it has one) could be clogged,,,,, ,or the tanks lil gas outlet where it gets into the sediment bowl is clogged,,,,, ,,,or the carbs side inlet strainer is clogged,,,,, ,,,,or theres a restriction or dirt in the needle n seat of the carb and shes not getting enough gas into and keeping the bowl full,,,,, ,,, or the gas is old or stale or has water in it,,,,, ,,,or theres water in the air cleaners lower bowl. I would start by opening the carb bowls lower drain cock plug and have the gas on and make sure a good continuous steady stream of gas around 1/16 diameter flows out at least a minute or two. If not, there may be a restriction in the needle n seat or else up stream in the sediement bowl or the tanks outlet pipe, I have seen many gunked up there. See if theres a good strong gas flow the size of the lines ID if you remove it from the carb??? If not, suspect the sediment bowl or at the tanks outlet. Is there a 3 way or other gas valve somewhere??? If so be sure they are fully open and in the correct position. Have you adjusted the carbs top load and idle needles?? That help??? Does it help if you choke her??? If so, I really really suspect fuel starvation, either cuz of flow to the carb (via tank outlet and sediment bowl) or the carbs neelde n seat or even the carbs nozzle. BOTOTM LINE BEST GUESS It sounds like shes running out of fuel cuz theres not enough gas being kept in the carbs bowl, which is either a needle n seat problem or a sediment bowl or carb inlet strainer restriction or a bad gas valve or even an air locked tank thats not venting. Try it with the cap removed. Otherwise the float level may simply be adjusted too low?? Any idea where its set at?? Lemme know Be sure and try the carb bowls bottom drain test to insure gas is getting to and then through the needle n seat !!!!! !!!! You might try n clean out the carbs side inlet strainer (remove top nut and round cap) and while in there use gumout etc to clean at the bottom down into the needle n seat area to remove any gum or dirt or varnish maybe John T
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