Trolling speeds?

I usually try too keep it around 2.5. A change up is always good when they are not biting. A little slower or a little faster can trigger a strike

It depends what you are using to measure your speed.  GPS and fishfinders, for some reason, usually read different.  I try to keep it about 1.5 acording to my fishfinder.  I've checked with a portable GPS, and they show 2mph plus at the same speen.  I generaly subtract .7mph from the speed of a GPS to figure the speed I need to go acording to my finder.  I figured something was wrong when my buddy, on a different boat, told me the speed they were going and I kept blowing past them.  Just keep in mind that almost everyone uses a GPS to display thier speed.  Granted there are times that you need to speed up.  In June I was getting fish in close trolling at 2.5.  That was after I was told to go 3-3.5mph.

1.7- 3.2 depends on what the fish fish want.