Linecounters might help, but each trolling day, even each run can be different… with or without the current (even lakes can have current), SOG, lure choice, etc can all affect depth to varying extents. Keep playing with the amount of line out until you get it dialed in and start catching. Or simply play up on the throttle for a little while. See if the fish don’t mind chasing it a little faster… You can cover more water as well as get your lure off the bottom a little more. Remember to make a mental note of you speed when the fish hit, as well as if it was on the outside rod, inside rod, or straight back if the fish hit during a turn. (outside rods = going faster, inside rods going slower during a turn). I caught walleyes up to 4.5 mph last year… They were just on a tear that day, but sometimes fast works just fine.
If you are using the linecounter, make sure all of the rods are set the same. The spools all filled to the same fill depth, the same leader length, and all the reels zeroed at the same point. If leader length varies, you might want to zero at the start of the leadcore instead of the lure attachment point.
I just tend to count colors until I hit bottom at that speed. I’ll then crank up until I’m not contacting bottom, and make a mental note that it took (for example) 4 colors to hit 21 feet at 2.5mph. If I want to raise up 5 feet, then I just reel in a color’s worth or so. Nothing overly fancy, but you can get a good idea of where your lure rides based off of using the colors. I’m not a pro, but I tend to find that counting colors might be easier than messing with the linecounters (although my leadcore reels are accudepths, which do have linecounters). If the fish tell you they don’t like it, then reel in a half color and see what happens.
for what its worth.
Mike