Plug for the Yamaha 8 HP
We went with the Yamaha 8 HP 4-stroke high thrust because it was lighter than the Honda, and only about 20 lbs more than the Tohatsu. We never noticed the weight difference.
On the high torque 8, the prop was larger with a more aggressive pitch, so it bit in and got the boat moving easily. I used to fight getting the boat out of her slip on a windy day, but with the Yamaha, it became a non-issue. On the other hand, the boat reached top speed at lower RPM, and the upper RPM range didn't need to be used as much. Fuel mileage was improved and noise reduced. Can't go wrong.
The Tohatsu control handle was a direct swap, although I found out that the neutral start interlock was never wired up when the boat was delivered. The other plus with the Yamaha was the elctric tilt, no more fumbling for the prop latch.
Our tillerpilot was wired into the Garmin GPSMAP fishfinder, so I could set it to maintain course to the waypoint. It was really nice on long trips to be able to leave the tiller to plot course on a chart or grab a sandwich and drink.
Adding stern rail seats can be tricky. My 23.5 did not have them. In the 93 models, the coamings were not reinforced with the aluminum mounting plates if you didn't specify the stern rail seat option when you ordered the boat, so retrofitting can be tricky. Crazy Dave Condon (my dealer) recommended against it.