IQ52 said

Sometimes mistakes are made, but not on mine. I've had Pro-Systems build me 4500 and 4150 carburetors and they have been really good carburetors. I'm sorry you had a bad experience. Should I need another carburetor, I wouldn't hesitate to order from them again.

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PRH said

Forget the flow test........ it shouldn’t have gotten any farther along than a visual inspection...... which it should have failed miserably.

Those are serious loads of shavings stuck in behind the booster flange.

Speed secret perhaps?

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