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mf 150 high idle adjustment

tbone I have a 1968 mf 150 with a marvel schebler carb. It will idle at 500 rpm but cannot get it to stay at 2200 high idle. when you move throttle to full open position it will peg out the tach. I have replaced the governor. Any help would be appreciated.
Juan My friend remove the governor connections at the buterfly shaft
use a spring in the baterfly links in topping against the screw regulator the low RPM. BE CAREFULL, with the carb idle position . Start the engine an regulate the RPM low speed 450 @ 600rpm
and now look the link rod and regulate loosen the nut and unscrew the conector.The engine is now run at low speed .before do the conecction , push an pull the regulator rod;by hand, must be a resistence elastical proper the cunterwheit working against the charge spring
Acelerate the engine by hand and note de movement in the governor links at desacelerate de engine
the governor test is Ok now, ensable the links( If not response the counterwheit; not ensamble the link, and remove and to repair the governor)
operate the tractor observe the power reposition was doing the gobernor in a correct operation
The governor surge , is correctible tensionate the gross spring was estabilice RPM

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