Im having an issue with a 616 motor where the throttle will not return to an idle position, but instead sticks midpoint. In playing with it, the two springs near the rear of the injection pump are super rusted and need to be replaced.
Also its doing this with all linkage disconnected, so there is nothing binding of that nature causing it. My question is are these external springs the only items that return the throttle assembly to idle? is there anything internal to the injection pump?

second question is will any spring do that has sufficient force to pull the rack back? IE, can I get one from a hardware store or does it have to be an MB specific part? The throttle seems to move easily back and forth, it just won't return all the way which im attributing to the weak springs

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