You don't have a carb issue. You have a tune up issue.
That thing is PIG rich. It's rich at idle. It's rich at cruise. It's most likely PIG rich at WOT but I can't see that from your pictures.
Have no idea what brand that plug is, but it looks cold. It also looks like your initial timing is pretty close. But from the picture, I can't tell if you have way too much total timing or not enough.
Either way, that's a tuning issue, not a carb issue.
What plug is that?
