That one won't work as it's made for electric motors. Steve shows this number as the correct one but it appears to have the incorrect one in the picture. http://www.offshoreelectrics.com/pro...=oct-ocfh5mm15 . The Octura part I'm thinking may be too long to fit in place of the ProBoat collet. Aquacraft has a collet also that could go in there but I'm not too crazy about theirs either.