In the process of installing dual 12's.
I have a 6" T&H Manual Z-Lock. Prior to install I had not adjusted the Jack plate at all, but did place markings for a zero measurement. I have them both on with no problems now other than the Starboard side being about 1/4 inch higher than the Port.
Where are you measuring from? Is the boat straight and level on the trailer if you are measuring from the ground?
I'll try to illustrate with a stock photo. Prior to doing anything, I made a marking on the Jack plate, (Blue) as a reference. Now it looks like the (Black) one. But only on one side.
It's level but I'll measure again this afternoon.
Last edited by Itismemc; 06-07-2016 at 01:59 PM. Reason: Added Photo
Mine look crooked sometimes but it is how my boat loads on the trailer too sometimes it maybe shifted left or right on the trailer just a tiny little and looks unleveled. I checked mine from the jack plate but if you made marks on your plate and now they are not lined up your plate may have been twisted or the main nut may have been loose allowing it to tilt once you took the pressure off?
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