I have a 1997 17'10" cobra w/ a 115 Johnson and I need to replace the prop. (Lost the old prop) . I am trying to find a replacement but need some help. First off I do not have a jack plate the motor is as low as possible directly bolted to the transom. Not into speed and all that anymore ( My Bullet days are gone.) Just want to get good efficiency out of the boat with decent performance. I'm currently running an 18 pitch PowerTech RXB4R18POM140. It will run almost 48 MPH on GPS @ 5600RPM, Good hole shot, good bow lift. Problem is that it blows out at the drop of a hat. Coming up on plane it blows out so I pull back on the throttle to let it hook up and it goes on. Slightest over trim and it blows out, minor steering corrections and it blows out.
HELP PLEASE!!!