Originally Posted by Bacchus
On the 6LYA the center hose connection is the bleeder - guessing the 4 is similar. Just pump until you get steady flow of fuel and then lock the hose connection screw down.
Are you unlocking the priming pump? The plunger knob is serrated if I remember correctly and has to be unlocked by turning the knob CCW.
Don't forget to push down & relock CW when done
Here's a pic of the 6LYA set up.
The images are to blurred to see, but the narrative is what I’m doing with the exception of the bleed screw which is attached to the hose on top in the center of the lid.
The pump is threaded and seems to be working.