RE: NOT FOR SALE BUT NEED A VALUE!
You would not get 70mph out of a 3.5 hp 23cc motor with the hydro. I'm getting 68mph with a 26cc 8hp Zen turning almost 19K.
You will probably get around 40-45 at best. It will be a just for funzy boat.
I wouldn't pay more than 500 for it complete.
Artie