Those diagrams are good but for items like this I always seem to have a hard time. Never taken one apart which also doesn’t help. Here’s a couple pics of what I do have. My guess was a sailboater messed with it or had it Mickey Moused to stay at a constant throttle so they could steer with a rudder. Sailing was never my thing, need to have an outboard!
You can see the sharpie marks that indicate a push pull motion to throttle the engine.
