Don't touch the 13mm Nuts on either side of the Port. The Nuts lock the Element Fuel amount setting that was done on a Calibration Machine.
There 13mm Nut on each side of the Element; I circled as many as were visable in the Diagram in Red.
In the 2nd pic the Blue Arrow points to the Fuel Injection Line Nut. Remove the Line.
The Yellow Arrow #1 points to the Delivery Vlave Holder that is between the 2 Nuts (the nuts you should not touch). You can unscrew that.
In the last pic you see #1 the Delivery Valve holder removed and parts #3 and #4 circled in Red. Carefully go in side of the Fuel Injection pump and remve #3 and #4 .
Put #1 the delivery Valve Holder back in the pump; just tightet it a bit no need to torque it yet.
Not shown in any of the pictures remove the Banjo Bolt where the Fuel Line from the Spin-on Fuel Filter goes into the top of the Fuel Injection Pump Housing. Remove the Banjo Bolt and the 2 Aluminum or Copper Crush washers.
With the Banjo Bolt removed you can now blow Filtered Compressed Air Down through the top #1 the Delivery Valve Holder. Have someone crank the Engine a little while you blow the Air in.
If the Plunger inside is moving like it is supposed to that should clear out any Holes insid that are plugged.
Put everthing back together and torque #1 to the proper Torque.
Find the Torque:
DIY Repair Links
http://www.peachparts.com/shopforum/forumdisplay.php?f=82
http://www.peachparts.com/Wikka/DoItYourSelf
Due to the amount of Air in the Fuel Filter Housing before you attempt to start you will need to do alot of pumping on the Hand Primer and also may need to looen the Fuel Injection Hard Line nuts at the Injectors to bleed the Air out.