I have used several Minn Kota electric motors on different boats including a Precision 21 and 23, which are much heavier than the O'Day 19. I sail on a "no power lake", so it's the only option. In a strong blow, they struggle, but they work. We use a solar charger so that the battery is always charged, and we have never run out of juice, even running the motor for a couple of hours at medium speed on no wind days. The motor on high seems to be able to move the boat in any kind of breeze, but being on a lake, we don't deal with big wave action. It's a beautiful thing - no gas, no fumes, no pollution, and almost completely silent. There is one larger boat on the lake of about 25' that has two electric motors, which I suspect would work in just about any situation.