Re: Downdraft Carb suggestions
A club member recently told the membership about his misfortune with a downdraft carburetor. His Model A is equipped with a downdraft manifold, downdraft carburetor, and an electric fuel pump. His thinking was that the fuel pump would block any fuel flow from the tank to the carburetor when the engine was shut off, therefore there was no need to shut off the tank valve. Wrong assumption.
He had not driven the car for about three weeks, when he went to do so he found that about four gallons of fuel had flowed into the intake manifold and into the engine, including the oil pan.
His advice is to always shut the tank valve off. One would also hope that the tank valve has the ability to shut off 100%.
Tom Endy
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