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Message: <blockquote data-quote="PSG-1" data-source="post: 404127" data-attributes="member: 6937">Moving the pump/engine forward seems like a lot of work.Let's try a quick fix and see if that helps. First thing, I would add some support brackets for that ride plate, as it does look like it's just hanging off, with not much support. Between the brackets and those rear mounting holes is where you would use the spacers. Don't put any on the front, you want to pitch the back end down. The idea is to use the ride plate itself as a trim tab.Try it in 1/16" increments, starting with 1/4"If that knocks out the porpoising, go down to 3/16" and see if it comes back. If not, step down to 1/8" One of these thicknesses will likely be the right amount of pitch to take out the porpoising. This worked for my boat, very simple fix.</blockquote>