Jackplate adjustment ???

Just gonna guess you have the slidemaster manual plate. Loosen the four bolts on the side (two on each side), dont back them out just loosen em up so it can move up and down. The turn the big bolt in the center of the jackplate just underneath the fwd part of the motor where all the fuel and oil lines come into the engine. I think its around 1 1/16th size bolt head-u cant miss it, tightening direction should raise the plate and “loosening” should lower the plate if i remember correctly. Then once you have the height set, tighten the outer 4 bolts back down good and tight! If lowering the plate sometimes you have to “jiggle” the motor a little bit to get it to come down evenly.

What everyone else said is correct. However, its very difficult to adjust the plate while the boat is in the water, as you might imagine. Id do it at the ramp while its on the trailer. You tend to lose wrenches when trying it out on the lake. Not to mention not having any leverage to tighten or lossen the bolts holding the slide.

I just tie some heavy cord to my 3/4 inch wrench and loop it around my wrist so I dont lose it in case it slips out of my hand when adjusting on the water. The marks prior to moving are a GREAT idea. Make sure to bring the sides back flush before tightening back up on the slidemaster plate. The center nut is the same size as your prop wrench, 1 1/16 sounds right. Ive adjusted mine many times on the water and carry spare tools in the boat in case I need to drop it in really rough water because of where I normally run mine. Carry a towel this time of year Bill had the best idea, if you are just dialing it in for the first time a weekday at the ramp with a few props and keeping good notes with each movement on water pressure, JP height, fuel load, etc…. is time consuming loading and unloading but it sure keeps you from bending over the back of the baot a bunch and allows you to measure pad height and take a break on dry land for a minute between runs.