I have been running a 28p 4 blade prop on my boat and at 75-80 [email protected] 5000 RM it starts to walk to the point I have to get out of it (or trim it down). I talked to the previous owner who had trim tabs installed but he said they didn't help so he took them off. He also said he would make a slight left or right hand turn and he boat would set and go 100. This won't work for me at the river.I was told a three blade prop would keep the boat in the water better? Any help is appreciated.