I am trying to get the butterfly on my Evinrude 18 hp 1959 model 15028 to flatten out - get to what I assume is wot. I have the link and sync where it should be, but when I try and open it up it is sticking on something - I can hear it hitting some sort of metal. Is it possible that the cam 9plate and follower) are hitting something and impeding its motion? It gets about 1" past the center mark, which would be about a 1/4 of the way to wot (as I understand it).
