Posted by ScottyHOMEy on November 10, 2009 at 16:50:35 from (70.105.244.147):
In Reply to: SA governor revisited posted by Dellbertt on November 10, 2009 at 16:16:02:
It's not unusual. I had one that started out working at the bottom and ran out of work about halfway up, another that didn't start until halfway up. I worked most of it out, and got them to respond over about three quarters of a full throw on both by straightening and bending on the linkage from the lever to the governor on the right side. Each adjustment on the right required a re-synchronizing of the rod from the governor to the carb on the left side.
A few other things come to mind. One is those two springs on either side of the blocks that links the lever to the governor. They get worn out and sometimes lose a coil or two over the years. Replacing them may help.
Another is the thrust spring in the governor, the one in the center shaft, that holds the button against the inside front of the housing. If that is weak or failed, it may make a difference.
The last may or may not be a problem. I need to get off my tuchas (OOOpppss! There goes the Yiddish again! How does a practicing Episcopalian pick this stuff up!) and go out to the garage and do some measuring. I've speculated before that the throttle lever/arm on the carb, if it's of a different length or geometry, could make or just aggravate the problem, by changing the amount of throw it will take from the governor.
At the least (and it sounds like you're there) you want to be able to achieve low and high idle from the lever on the seat, and then work from there. Having the benefit of finer adjustments to motor and therefore tractor speed is never a bad thing, whether raking hay or trying not to run over the Cub Scouts in front of you in a parade.
What are you using for a tach? I found an inexpensive laser tach that works well for me.
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