I'm rebuilding the carbs on my 85393D and even have a set of carbs off of a 115hp, my questions are which carbs should be rebuilt and is there such a thing as low speed idle adjustments screws on these? I've looked at both of them and they look the same except that the number is bigger on the front of the 115 carbs 1 5/16" versus I think 1" and I can't find the low speed idle adjusters for the life of me.