?[b:654c4848f0][i:654c4848f0]Description of settling bowl says it does not shut of fuel, so what is the quarter turn petcock doing?[/i:654c4848f0][/b:654c4848f0]?
Take a look at the [b:654c4848f0]FUEL SYSTEM[/b:654c4848f0] diagram below.
Note the Body and Shut-Off Valve (Key 37) part no. [b:654c4848f0]AC 1079 R[/b:654c4848f0] and Shut-Off Valve (Key 39).
Take a look at the photos below of the two positions of the shut-off valve.
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Take another look at the [b:654c4848f0]FUEL SYSTEM[/b:654c4848f0] diagram below.
Note the Three-Way Cock (Key 11) and Fuel Filter (Key 19).
If the shut-off valve is CLOSED, then the fuel from the large tank does not flow to the fuel filter.
If the shut-off valve is OPEN, then the fuel from the large tank flows through the fuel filter to the three-way cock.
Take another look at the [b:654c4848f0]FUEL SYSTEM[/b:654c4848f0] diagram below.
Note the Gasoline Pipe (Key 9), Three-Way Cock (Key 11), Fuel Pipe (Key 17) and Fuel Control Rod (Key 22).
Take a look at the photos below.
Note that fuel from the small tank flows through the gasoline pipe (Key 9) directly to the three-way cock.
If the fuel control rod is in the [b:654c4848f0]O[/b:654c4848f0] Off position, then the fuel from both the fuel filter (large tank) and fuel from the gasoline pipe (small tank) does not flow through the three-way cock.
If the fuel control rod is in the [b:654c4848f0]G[/b:654c4848f0] Gas position, then the fuel from the small tank flows through the gasoline pipe to the three-way cock.
If the fuel control rod is in the [b:654c4848f0]F[/b:654c4848f0] Fuel position AND the shut-off valve is OPEN, then the fuel from the large tank flows through the fuel filter to the three-way cock.
Hope this helps.