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Husqvarna 6128 B&S floods under load, I've changed battery, spark plugs, air filter. will start at low idle, when I increase throttle the engine floods out. When I shut off fuel to engine the engine will run under load until fuel in line runs out. can someone help please

B&S model xxxxxx, type xxxx, trim xx & code number.

Ill find out, the mowers not here, thank you

B&S model xxxxxx, type xxxx, trim xx & code number.
Model - 966613101 maybe 966613102
I don't know what trim is or code number

Model numbers don't know witch one
400000, 440000, or 490000