need to extend prop shaft-how?
I don't know what threads the 61 has , likely 5/16. I have bought some from Fox for 1/4" threads and they are only $6.00 or so. The one I have set the prop 3/4" forward and are real simple, they have a spacer and a nut that almost looks like a bolt that has been drilled and taped.Hope this helps some. Steve