Inspect Fuel and Confirm Valve Clog

What happens here

After removing the valve, observe the fuel actively draining from the tank connection. Note its color, consistency, and presence of any visible rust or sediment, confirming it's 'rusty crusty nasty' fuel. Once the initial flow subsides, inspect the fuel tank outlet to ensure it is clear of major debris. Then, focus attention on the removed shut-off valve itself, inspecting its internal passages. Attempt to blow air through the valve to confirm it is indeed clogged and no fuel can pass through.

Goal: Assess fuel contamination and verify the shut-off valve is blocked.