carburator, aftermarket, 1996 bayliner capri, mercruiser v8 2bbl

1996 Bayliner, aftermarket 2bbl carburatot from China for V8 Mercruiser 305

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Is there a question? Generally speaking, idle in neutral engine fully warm in water must be under 1,000 RPM, shoot for 700 ~ 750 RPM.
That carburetor isn't the original, the original was painted black.