Re: Johnson CD & RD Crank taper question Home › Forum › Ask A Member › Johnson CD & RD Crank taper question › Re: Johnson CD & RD Crank taper question frankrUS Member - 1 Year (includes $3 online payment fee)Replies: 6715Topics: 51 September 7, 2018 at 9:06 pm #82409 How ’bout an 18-20hp electric start flywheel with a thicker ring? Trying to make a super slow trolling motor, ain’t ya?