Entity Ken Wilford spoke thus:

> the arm could only go on
> one way.  That there was a notch in it or something that would prevent a
> dummy like me from taking it off and putting it on wrong.  However there
> is not.  The splined shaft is the same all the way around so you can put
> the linkage arm on pretty much any way you want.  But the pump itself
> cares which way the arm is on and it will not work properly without it
> in a specific orientation.  So I am suspecting that our power problem
> could be due to the fact that this linkage arm is not installed
> properly.  Therefore the throttle is not getting the chance to open up
> all of the way and therefore we are not getting the full power that the
> engine can deliver.
Sounds like you have figured it out. When you turn the lever how far does it
stroke before revving up?
For best results the angle of the arm and cable needs to be 90 degrees at
halfstroke. It's possible aren't even getting the entire stroke out of the
arm.
It is real tricky getting the rotating assembly on there with the spring at
the right tension. Use your head and take it slow.

-- Gnarlie
Better to be thought a fool and lurk, than to post and remove all doubt.