I had 1994 250 Yamaha on a 228G, and when trimmed just right it would run at 5600-5700 RPM. Prop was marked, if memory serves, with "17M" which I think means 17 " pitch and I think it was 15 1/4 diameter. I did not have a fuel meter so can't tell you what to expect there.
4,700 RPM is...