Hello, I have a 74 150 and have noticed that, with all three idle mixture screws set at anywhere from 2-3 turns out, the top two plugs look normal and the bottom 4 look flooded or too rich - virtually clean. The cylinders have verifiable spark. And when disconnecting each one there is a noticeable difference. I was wondering if it is common on these to have some variance between the idle speed settings on each carburetor? The boat seems like it is loading up out of the hole and I'm wondering if it has something to do with 2 of the carburetor settings being too rich. I had them all set at 2.5 turns open, but the spark plugs look different as noted between 1/2 and 3-6. I appreciate any advice or direction. Thanks a lot.<br />Also, the carburetors have been rebuilt and it runs fine other than the loading up and apparent mixture problem..
