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Engine is 200 TXRT 1995. I am in early hours of engine break-in. On intake starboard fuel lines from carburetors to crankcase, on intake diagrams lines #12 and #13. Lines installed are clear heat resistant plastic. Two top lines show some action inside them, like moving boiling liquid inside, they are from top and middle carburetors to cylinders 1 and 5. But same line (bottom one) from lower carburetor to cylinder 3 filled with gas/oil mix and apparently not moving, no bubbles of air inside. In your experience, is that normal or not. Appreciate your expert opinion.