If this helps--
The float control consists of a sloped ridge on the bottom of the rod/plunger, which pops into a split ring at the base of the float control's cover -- rather like a snap closure on a jacket, for example. The split ring has to be open enough to be able to get the rod to pop into it, but --in theory-- tight enough so the rod stays "locked" into position.
I was unable to hit that happy balance. The rod will pop into position when the control lever is pushed upward firmly, but as soon as I hit a bump it'll pop back out again and you get the "digging" going on. Tighten up the split ring, and I can't get it to pop in.
So, I just keep my right hand on it with constant upward pressure to hold it in float. Not that hard to do.
Here's what the innards look like -- in the first pic, you can see the split ring in the very bottom of that cover; 2nd pic shows the end of the rod that locks into the split ring. As you can see, I cleaned & re-greased it, but it still popped out easily. Maybe somebody else has a better solution.