i ran an ’09 with 150hp main and a 9.9hp kicker for 4 years. it did not impact the balance or running performance of the boat in any noticeable way, and with an extension handle it was quite easy to operate from the driver’s seat.
the 150hp didn’t lend itself to trolling as nicely as a 115hp would have, so that was a consideration, as well as keeping the hours down on the main motor. in my case, i mainly used the kicker to forward troll for muskies, usually 3.5mph – 5mph, and those speeds aren’t the kind of thing you can do with an electric. when trolling tight on the rocks it also allowed me to keep the big motor’s prop kicked up where it was out of danger. i fish LotW very late in the season when there aren’t many other boats around, so that kicker is a safety factor as well. i had the ignition on the big motor burn up one year and that kicker both got us back to camp from 10 miles away and meant we could still fish the last few days of our trip.