Posted by John_PA on October 14, 2011 at 02:21:57 from (71.182.160.115):
when you advance the throttle on a cub, it should snap open slowly, or if it does open faster, the governor should immediately reduce the amount of throttle and the engine will wind up smoothly.
On the combine power plants, the throttle response is very quick and over dramatic. It will cause a normal cub to stall out.
There are 2 adjustments. bumper spring and fast idle, on the governor. Which one of these adjustments corrects the problem, going from a power plant governor to a regular cub tractor?
I did take the slop out of the linkage, had the typical slop where the linkage has a key way to the gov.
I did also adjust the carb linkage so that with the throttle at wide open, the carb is at wide open with the engine not running. (I've had my share of cubs over the years)
Seems like every gov I get from a combine has this hyperactive disorder and wants to surge hard... bummer...
So, anyone know where I should begin? bumper spring adjustment? fast idel adjustment? carb is tuned like a swiss watch, but on any updraft carb, if you have it at low idle and snap teh linkage wide open, it will stall it out. To prevent that, the gov should "govern" the linkage and not let it slam wide open at the mere touch of the throttle lever from idle.
tis baffling to me right now. might be lack of sleep, or my father's voice screaming in my ear... "Don't adjust the governor!!! check everything else!!!"
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