Ran our old 1985 evinrude full throttle regularly. It was 30 years old with God knows how many hours on it. It was from back in the days when boats and motors were much simpler, it didn't have a temp gauge, tach, hour meter, or speedometer. It had good compression and would still start on the first crank every morning if you primed and choked it.
New motor is a 150 Suzuki four stroke. Its only a short ways out of break in. Its never been over 4500 rpm and only that high a handful of times.