Thread subject: Whaler Central - Boston Whaler Boat Information and Photos :: 15' "Classic hull" speed
Posted by huckelberry145 on 04/17/15 - 9:40 AM
#11
wlagarde wrote:
It depends upon the gear ratio of your lower unit. See this link: http://www.mercuryracing.com/prop-sli...alculator/. Assume a slip of 5% as a start to get an idea of whether your prop is in the ballpark of what you need.
With the speed/rpm values previously given with a 2.33:1 gearcase, motor trimmed down , 15% slip, trimmed up 4%.