Iíve got a 75 on a 5m rib. It has been faultless for five years or so now.
Starts on the button, quiet, lots of power and pushes the rib along at 35 knots or so maxed out.
Only downside has been that no one seems to want to service it.
Plus side parts easily available and Iíve learnt to service it myself proving very diy able so far.
Iíd definitely buy another.