I've used a 50 Honda with the idle speed adjusted way low on a 1852 jon, and Yammy 90 4 stroke with the variable trolling speed all the way down on boat I've got
now - both went too fast without some help, either trolling plate or dragging
socks. Worked ok, but finally ended up with 8 horse 4 stroke kicker.
Oil changes came around a little too soon to suit me trolling with the big motor. The Honda wasn't as bad at 2 qts, but the dang Yammy holds 4.5