Endlink, did your new part have the float like in the pictures earlier in this post? That was the fix to the failed design, an actual float that the sonic sender can bounce the signal off of instead of the surface of the fuel.
Just ordered mine. Is the replacement procedure found in the service manual?
I see it lists a 75210-07 for the '07's and the part that's specified in this thread is 75210-09a which can't be found so we order the 75210-09 and it has the new float in it. I checked 2 dealers, Kutter and Surdyke, and the 75210-07 isn't available either so I believe it's been superceded by the 75210-09 which is actually the 75210-09a....I believe you need the 75210-09.