I have a '87 150 supersix on a 18' bass boat that after sinking it and a year of working out the kinks, runs great. My only concern is over-reving of the RPM's. The boat will run 65 mph at around 6500 RPM at about 3/4 throttle, but when i give it full throttle, it jumps past the tacks 7500 RPM...
