I am going usually 5-6km offshore.
I do you use a 2.5Hp/4 stroke (Ultra low emissions) Yamaha. Next year planning to get a 3.5Hp Tohatsu.
The part that I like about these motors is that in drive at minimum speed consume very little gas.
With 1L of gas I can troll 5-6 hours. I don't consume more than 1.5L per exit.
Also in Drive (D) with throttle at minimum the speed is around 3Km/h (ideal for trolling).
If you are in top of the fish the action is crazy.
I had last Sunday one in the net/boat jumping, second one on one rod fighting with it and a third one hooked on second rod. I need more arms.
I am hooked to Erie for a while. The fish are great to eat, the one in 2-3-4 Lb range.
If you want to come I can pull you in the fishing grounds and pull you back to the shore.
I did that with other friends that run out of batteries or arm power.
I might go once this year again there.