Small Engines (Lawn Mowers, etc.): Honda GX160 Over-revs out of CHOKE, honda gx160, honda tiller

Question
I have recently received a Honda tiller from my parents that did not work. The engine had locked up on the first pull; after it had sat outside for about 2 years.  I tore the whole engine apart, just to see how one works, and saw that there was rust build-up in the piston from the rain coming in from the exhaust valve.  I cleaned the whole engine, piece by piece, until it shined.  Replaced all gaskets, tore apart and cleaned the carb, twice, replaced both rocker arms and rods, due to overtightening.  I have got the engine running now, but as soon as I take it out of choke the engine revs up to the point that I shut it off before it explodes.  I have double checked my throttle linkages and springs to make sure they are correct, and they are.  What I have noticed is that the throttle running to the carb is staying open.  Is it possible I didnt hook the governor up correctly when re-building the engine?  To my understanding the governor pushes the throttle lever at higher rpm's which closes the throttle valve on the carb slowing down rpms. Unfortunately that is not happening on my engine.  I have also set the valve clearance, twice, and am simply stuck.  I've seen your answers and truly believe its time for me to ask.  This motor is supposed to be put on a go-kart for my son for christmas, so hopefully I can get it done by then.  So please set me in the right direction, you are my only hope before I completely tear it apart again to check the governor.  Thank you for your time and input it is much appreciated.  

Answer
Hello Rian:

>>Try Setting the Governor Arm First.
>>The Following is an Instruction File I Made for Setting the Governor Arm Correctly. Any Input is Appreciated.  
>>If you Removed/Loosened the Governor Arm from the Governor Shaft (Shaft that goes through the engine block) or Put the Linkage in  a Bind when the Carburetor was Removed, then Reset the Governor.
>>**To Reset the Governor; Loosen the Governor Arm Bolt and Turn the Governor Shaft Clockwise Until it Stops.
>>Using the Governor Arm Hold the Carburetor to Full Throttle. Now with the Shaft Full Clockwise and the Governor Arm and Carburetor Held at Full Throttle, Tighten the Governor Arm Bolt.
>>If the Engine Still Runs Full Throttle, then Reverse the Rotation of the Governor Shaft, but Still Hold the Carburetor at Full Throttle with the Governor Arm.
>>**If it Still Runs at Full Throttle, then Check the Internal Governor.**
>>You can View a Breakdown/IPL of this Engine at this Site Addy, http://www.outdoordistributors.com/ and Select Click Here For The Parts Menu. Now Select H. Then Select "CLICK HERE" If You Don't Have Your Part Numbers We Have Illustrated Parts Lists For Most AYP Lawn Equipment Models! Model lookups will open in a new page.) In the New Window Enter your Model Numbers and Click "Search". Now Select your Model and Download the Breakdown for Online Viewing.
>>If Setting the Governor Didn't Correct the Problem, then
>>Make Sure the Carburetor Control Levers are Moving Freely.
>>If they are, then
>>The Internal Governor may Not have the Governor Shaft Resting on the Internal Governor.
>>Open and Check the Internal Governor and make Sure the Governor Shaft is Resting on the Internal Governor when you Replace the Sump onto the Engine Block.
>>If you Hit a Snag or this Does Not Correct the Problem,  I am Here if You Require More Assistance. Hope this Helps. Let me Know What Happens, Please. I Hope you Had a Happy Holiday and May the All Mighty Bless You and Yours. Be Safe and Happy. Thanks.

Good Luck

Respectfully

John

PS: I am Allowed to Answer 3 Questions a Day. If you See I am Maxxed Out, then Try Submitting your Question at or Just After 8pm EST (US). My New Day Starts then. Follow Up Questions are Received Anytime. Comments and Ratings are Greatly Appreciated. Thanks.

Respectfully

John