Get a Honda
I replaced an old outboard on an O'Day 23 with a new Honda Four-stroke (a 9.9 in my case)based on almost universal good reports. This motor is more than the 23 requires, but can easliy be used on a bigger boat. Being relatively new to sailing, I wanted something dependable. So far with a few hours on it, I am very satisified. It has a 12 amp alternator and electric start. It makes life easier for a new sailor. I also am converting to a starter and house battery system with three switches for crusing purposes. Good luck.