Tractor Repair: Scotts L2048, carbeurator, throttle lever

Question
QUESTION: I have a Scotts L2048 lawn tractor that started revving at very fast rpm.  I learned it was probably a broken internal governor.  I opened up the block and it was indeed broken.  I replaced the governor and put it all back together.  It is still revving at the high rpm.  Any suggestions?

ANSWER: Hi mark
May be the blade of the governor is round the wrong way.
I believe the air flow from the fan controls the blade movement ,and the throttle opening!
But check that all cables are free to move and the throttle lever its self is not jammed or the cable not kinked .
Martin

---------- FOLLOW-UP ----------

QUESTION: Martin,

Thanks for the reply.  I'm not sure what you mean by the blade of the governor.  The governor could only fit one way.  I'm pretty sure I installed the new one correctly.  The throttle cable and choke cable appear to be working properly.  The linkages and springs that control the fuel and air flow appear to be okay also.  I opened the carbeurator to check the choke plat was moving properly and it is.  When the engine is on, the only thing that will slow down the rpms is to put it on full choke.  This is just starving the engine of oxygen. Which fan are you referring to?  Do you have an engine diagram I can refer to?

Thanks, Mark

Answer
Hi mark.
If iam correct this is an air cooled motor--- a fan is attached to or built into the main flywheel as this rotates the subsequent air flow passes over and round the engine thus keeping it cool when running!---
most governors that i have seen are a plastic or metal flap (blade) that is in the path of the cooling air from the fan. the pressure varies with the speed of the engine thus causing the blade to swing . this in turn is connected to a rod then the carburetor thus controlling the throttle opening. if this blade is fitted perhaps wrongly then it may force the carburetor open instead of closed ,thus giving high revs instead of low !
Obviously full choke is not a good way to slow the engine .
The manual is your best bet to check lay out. BUT you seem to have done all the wright things to control this problem.

Depending on the type of carburetor ---?  i suppose that the carburetor has not come loose on its attachment to the engine? Is this a butterfly type carb and is the shaft of the throttle connected to the internals of the carb ok
sorry this is all i can think of at the time.
Martin