new magneto failure

Ordered a new magneto and the new unit works. started the engine. Here's a question.. The B&S has a Fuel shut off solenoid on the Carb bowl... why? whats the purpose of that? I noticed mine might be a problem when the tractor is moving. I think the connector might be bad. Any way to bypass it? why, why, why??? :thumbdown:
 
It is an "afterfire" solenoid. Which cuts off the fuel when the engine is shut off, so when the engine is winding down after shutoff, it is not still cranking fuel into the engine, thus the muffler, after the ignition is cut off.
 
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