I have a 96 stratos d/c 288 with a rude intruder 175 this spring motor and lower unit went out. Have a rebuilt powerhead and a new lower unit. the boat before trouble would go 64 gps trimmed up to 5500 rpms. it would walk a little. now it only tachs 5200 and it's walking if you trim it up for more rpm's it walks dangerous. I have a turbo lightning 14 3/4 x 25, and a raker II 14 1/2 x 24 doesn't matter which prop it acts the same. don't know if the new motor has a little less power than the old one. do i need to get different prop that will go 5500. also do i need to drop the motor some for the walking. it just seems crazy how you can replace powerhead and lower unit and it runs totally different any help greatly appreciated.