Why does Boat bounce?

I have an 86 Vector, with a 150 Evinrude with a 225 powerhead on it and an eight inch hydraulic jack plate.  When I try to trim it out to get on the pad, the nose starts bouncing, the more I trim and accelerate the worse it gets.  Why?  Any helpful info would be appreciated!


David Parker



The prop selection or weight distribution could make the Vector never take a set. The 8" plate is a bit much, so try moving some weight forward. If you cannot easily, then put some 20 lb. shot bags ahead of the foot board and try it. That is where I would start. 




Please submit whatever questions you have to IHRTechTalk@yahoo.com.  All questions and answers selected will be displayed on this page as they come in.  Note: though all boaters are welcome, priority may be given to I.H.R. members.  Randy can not be held responsible for any advice given.  Though his information and expertise is second to none, he has no control over what you do with your boat.  It is up to you to boat safely and act responsibly, and his advice is only to be used as a guidance for your high performance boat/motor of which you are the one responsible for the risks involved.

Mark C.


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