577 hours. There is no retainer shown in the parts listing and today I tried to get a look at the back of the rod but there is no way without cutting a hole in the center frame piece.
Well it lasted about an hour before it popped out again!. I do not see any sign of how it pops out, it is a real struggle to get it back in there. This time I bent the switch mounting bracket that has the guide tube on it out at the rear so it tends to move the front of the rod to the left...
I did not find it there, but I did eventually find a parts picture on the kubota.ca site. The part in question is the ROD,NEUTRAL HST, part #6C15043430. Looks like there is no retainer on the back side.
Makes me really wonder how it got popped out in the first place!
Worked on a friends B2620 that would not start. Turned out the rod that pushes the HST treadle safety switch had popped out of the hole in the metal cam plate behind the wall of the case.
That is one b@#$%h of a thing to get at....
This picture was taken after I forced it back into place...