B&S 10/12HP throttle repair

[jaylees150]

UPDATE

Having re visited this today in the daylight while I had some time, I have the throttle cable connected up and functioning properly. And I have the governor linkage and spring connected up as well. With the engine shut off I can manually push the throttle plate closed and it springs back nicely.

I re connected the battery and tried to start it with the throttle lever in the low revs position without success. As of right now I have nothing to connect the choke mechanism.

 

[bentrim]

See if this helps. In your pictures the spring appears at an angle, it should be limp and in a straight line when in the idle position and pull on the governor arm as the throttle is opened. It also appears the bracket is not properly attached to the block, the top bolt is missing, this may be why the governor is not functioning properly.
When the engine starts you are saying the engine goes wide open? This could be that spring incorrectly hooked up or the governor is out of adjustment or not functioning. Unhook the spring and start the engine, it should immediately go to idle. Push on the governor arm and it should have a force trying to close the throttle. if not you have a governor issue -- out of adjustment or a failed governor.
A governor works by balancing the force of the flyweights against the spring -- the more the spring pulls the more the flyweights attempt to pull the throttle closed. That balance is the speed that you set the throttle at. The more you open the throttle the more pull is applied to the governor arm. The flyweight then attempt to close the throttle but can't due to the applied spring pull.
The second attachment is NOT a verticle governor and does not apply to your engine but it is the best diagram I could find to explain how a governor works.

 

[slomo]

UPDATE

Having re visited this today in the daylight while I had some time, I have the throttle cable connected up and functioning properly. And I have the governor linkage and spring connected up as well. With the engine shut off I can manually push the throttle plate closed and it springs back nicely.

I re connected the battery and tried to start it with the throttle lever in the low revs position without success. As of right now I have nothing to connect the choke mechanism.

Got to have some choke for cold starts.