A little late to the party but yesterday we did initial Sea Trials on our same boat (2003 2300 CCDV). We had a 2002 225 Yamaha 4 stroke (likely 205HP).
This new engine is a 2023 DF300AP - 300 PS (295 HP). We had seen others on this forum with the same prop so we used it as well - 3 x 16 x 18.5 Suzuki. Only one brief run-up in throttle witnessed 5900 RPM. This was less than 2 hours on the motor, so should improve perhaps 100 RPM after break-in. Our boat had about 80 gal of fuel, 3 men and the usual complement of gear. We have a T-Top on the boat, and the water tank likely had 20 gal. in it.
We were very pleased the performance. This motor specifies a range of top RPM as 5700 - 6300. I rarely operate full throttle so am mostly concerned about cruising speed and economy. Considering I went from 40 mph on the Yamaha with the same load to 48.5 mph same load I'm very pleased with the power. We were seeing 3.5 mpg from 25 mph to 27mph, 3.3 mpg. at 33 mph. All this is with 1.5 hrs on the new motor -
according to the dealer (Nick's Creative Marine - perhaps largest dealer in the SE other than manufacturers), it should improve a little after break-in.