D2 5U Throttle friction adjustment question

I don't know anything about the insides of the magic box but I had same thing happening on my d2 and had to replace the spring in the throttle handle. Holds its position good now

I added an extra spring on the linkage on mine

I rebush the clevis ends on the linkage and replace the clevis pin with a bolt with correct shank length and shortened thread to where I can put the required pinch on the joints. A lot cheaper and more feasible than replacing the ratchet components in the governor. I also fixed one by rotating the ratchet ring in the governor control to a less worn area which also works after removing dowel pins.