well this is good news, i have the same engine the TT 61 pro BB ABC and put it in my tower trainer 60 and flew for the first time in about 2 yrs. and all was good but same with me as well, very hard to start - i had to prime it like all get out and finally got it to run, but then sure enough it dead sticked on me, it seems to run well, when it runs but doesnt last long and then just peters out, i noticed mine seem to like to run on the rich side, maybe i need to make it more rich.

im about ready to pull it out and put an os in it but i here some of folks seem to have great success with it, so im going to keep it in and give it another couple whirls.