When you adjust the idle air screw that hole is where the air comes from. The fuel is metered from the pilot jet. When you screw the air adjuster in you richen the mixture, when you screw it out you lean it.
When you adjust the idle air screw that hole is where the air comes from. The fuel is metered from the pilot jet. When you screw the air adjuster in you richen the mixture, when you screw it out you lean it.
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