Re: carb adjustment on OMC 18 hp

[Don]

I wouldn’t worry too much about the color of the spark. But, it should be able to jump a 1/4" gap while cranking, have you tried that?
Looking at your pictures, I am worried that one of the coil primary leads might be rubbing on the point cam, the condenser leads are positioned too high as well, although they don’t look like the flywheel has been hitting them. Have you cleaned the points, then sprayed the open contacts with brake clean/electric clean spray?