Deep V outboard height install

  • onestout
    Hudson, WI
    Posts: 2698
    #1355668

    In the picture I have the bottom of the level on the top of the cavitation plate. Does it look like this is installed to high? With the static jack plate I have about .75″ of set back.

    TheFamousGrouse
    St. Paul, MN
    Posts: 11664
    #1401092

    There isn’t any way to tell for sure without running the boat, but IMO it LOOKS too high. It looks to me like the on-plane water line is going to be about an inch or so below the highest arc of the prop. In other words you’ll be ventilating the prop.

    But that’s just an armchair assessment. The way the water comes out from under the hull varies from boat to boat, so I’m just going by what I’d anticipate would happen. YMMV.

    broadwaybob
    Janesville, WI
    Posts: 402
    #1401099

    Who set the height of the motor? Was it the dealer or yourself? The real test is on the water. The AV plate should be visible and just above the water when on plane with optimal trim. The AV plate does its job at takeoff and is done once the boat is on plane when the pressures tend to equalize ahead of and behind the prop. Does it “look” high? Yes, but the only real test is on the water.

    flatfish
    Rochester, MN
    Posts: 2105
    #1401103

    Maybe it’s just me but the best I can tell from your pictures is: that I think your – about 1 to 1.5 inch high. I believe deep V’s are designed to both cut the choppy water and by both pushing the water to the side as well as DOWN. Displacing the water down, the way your setting right now, I agree with the gentleman above that says you’ll be ‘ventilating’ the prop. You’ll experience ‘blow-outs’ in turns that aren’t even that sharp. The cavitation plate should be no lower than the bottom of the boat.
    As controversial as it is, I’d also recommend a ‘whale-tail’. This will help with porpoising and with any ventilating, as well as helping with potential ‘blow-outs’ in tighter turns.
    That’s my .05$ worth…

    flatfish
    Rochester, MN
    Posts: 2105
    #1401105

    BTW : what are the specifics on that prop? HP is???

    robby
    Quad Cities
    Posts: 2827
    #1401151

    No advise just a comment. I’ve always had bassboats. I’m amazed! I’ve always rigged my boats so the prop shaft is as close to parrellel to the keel as I can control and maintain water pressure. 2 inches below its where I start. Move up from there depending on chine. Hydrolylic stereo g is a godsend. Apples to Oranges.

    John Schultz
    Inactive
    Portage, WI
    Posts: 3309
    #1401199

    How does it run? RPMs where they belong? Do you get cavitation in a straight line? Do you get it on turns? If it runs well, the RPMs are in range, and you don’t lose bite on corners, then it isn’t too high. Every boat / motor is different. My last boat was very similar to the pics when you looked at it out of the water, but that was how it performed best. Only way to know is to run it.

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