Small Engines (Lawn Mowers, etc.): Govenor, briggs and stratton, butterfly valve

Question
I have a Briggs and Stratton engine / Theese are the numbers I found on the engine: 12L902 0667E1 060228FA
Can't find this model on Briggs website.It is on a weed eater mower and listed as a Q4.75 engine.
The problem :There is no throttle adjustment only a govenor that holds the butterfly open to a certain rpm.However the butterfly stays in the closed position. There is a rod attached to the butterfly valve and the other end disappears into the engine somewhere. There is a spring attached on the other hole in the valve.
My question is what does the rod attach to that I can't see?
A drawing would be helpful

Answer
Hello Steve:

The Rod is Called the Governor Link and is Attached to the Governor Arm. The Governor Arm is Attached to the Governor Shaft and the Governor Shaft is Moved by the Internal Governor. The Breakdown of this Engine shows an Internal Governor. Some Models have an External Governor Vane that Uses the Air from the Flywhel Fins to Govern the Engine Speed. You can View a Breakdown/IPL of this Engine at this Site Addy, http://www.smallenginepartswarehouse.com/parts.asp and Select the Shop Online Parts Look Up. Then Select the Model Tab. Then Select the OEM and Enter the Model and Type Numbers (12L902-0667). Then Double Click on the Model in the Results Area. Now you can Select the Section of the Engine you Wish to View. Hope this Helps. I am Here if You Require More Assistance. Let me Know What Happens, Please. Thanks.

Good Luck

Respectfully

John

PS: I am Allowed to Answer 10 Questions a Day. If you See I am Maxxed Out, then Try Submitting your Question at or Just After 9pm EST (US). My New Day Starts then. Thanks.

Respectfully

John