Throttle Cable Adjustment 40hp Mercury 4 Stroke

Just purchased a 2004 Mercury 40hp 4 stroke. Trying to workout a few minor issues. When I turn the tiller handle to WOT and look at the butterfly valves in the carbs, they look to be about 3/8" to 1/2" from parallel. I can't figure out how to adjust the throttle cable to get the butterflies to parallel. I have no more adjustment to take out slack from the cable on the carb linkage. Only other place I can think to take slack out would be at the tiller handle connection????

Anyone have any ideas?

Anyone?

No Answer for you but you could try here.

https://www.marineengine.com/boat-forum/forumdisplay.php?f=30

Thanks, I will give that form a try.