ok it may be simple….like my snowblower problem…. run a decarb/tuner product like MercPower Tune or a half or full can of Seafoam costs a few $$$ may solve the issue.
have you tried pumping the bulb while it dies ?? yes no ?
it is starving either it is not sucking fuel (bad crankcase seals has suggested by billw causing a vacum loss needed to suck the fuel out of the carb jet) or fuel flow is restricted….help it (tried lifting the tank above the motor while it dies yes-no ?
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