View Single Post
  #5  
Old 05-13-2013, 07:57 PM
bitsamonkey bitsamonkey is offline
Member
 
Join Date: Jan 2008
Posts: 95
Default

You've got some other problems. The df175 has a 2.5:1 lower unit and should easily swing at least a 20" prop. My 18' with a df90 which has a 2.59:1 lower unit ratio runs a cupped 18" prop to 6300 rpm.
Reply With Quote