I found the solution. Adjust the Operator Presence Control rod to be shorter. This is adjustable but is not covered in the owners manual. The interlocking latch disengagement dowel was too close to the latch.
- Remove the cotter pin from the link end.
- Remove the link end and washer from the bell crank.
- Loosen the lock nut.
- Turn the link end up the control rod (I turned mine 2 full turns).
- Insert the washer on the link end and the link end into the bell crank.
- Install the cotter pin.
- Tighten the lock nut.
If the blades still pop out, repeat the procedure.
Here is an illustration of the parts:
View attachment 42905