>>2955660
> not sure how the spring goes back on

At the lowest point, hidden from your blurry half-photo, but shown clearly in the attached photo, is the bottom tab of a pivot. It secures the governor spring. The tab can be bent further down, to increase the bulk tension on the spring (think of it gross tension adjustment). The tab is part of a piece of metal that is fixed to the backside of that plate with a rivet. The top arm is much further up, that is what your throttle cable is moving back and forth, causing small adjustments to the spring tension below. The arm coming out of the case on the left side, translates engine rpm (sorry i said earlier the flywheel system did, true on some models - not these) into counter-tension. The balance has to be set correctly.

On the generator style, there is a knob instead of a throttle cable, that can draw in and out the upper pivot arm. That then dials-in the exact tension for correct RPM, hence voltage and hertz. Your low effort photo barely shows the top part linkage, which DOES look correct.

I can't see in your photo. My guess is simply the spring tension is too loose, because in all the fiddling with it, you or someone before you, yanked on the governor mechanism and the stress pulled and bent that lower spring tab out of adjustment (up). You may try bending the lower spring retaining tab down, to tension the spring more so the mechanism is not 'bouncing'. You have your throttle pulled all the way in one direction, and the RPM's are still flailing around, with no load, when they should be steady. Indicating not enough spring tension.