WOT RPM on '92 PCM 5.8 Pro Boss
I have a '92 Mariah with a PCM 5.8 Pro Boss and 1.23:1 reduction gearbox. RPM at WOT is about 4000 with 3 people and a fulltank of gas. The highest i've ever seen is 4200 with a very light load. Should the rpm be higher than that. The boat has the original OJ 14x16 3-blade nibral prop on it. I had it straightened and balanced at the beginning of the season. There is VERY little vibration. Am I overpropped, is this just the nature of this older beast, or do I have some other mechanical problem? Thanks in advance for any insights.
DKJ
1992 Supra Mariah - Red
PCM 351HO 285hp - PCM 1.23:1 Transmission
OJ XMP 4 Blade CNC 13x15.5RH
"People do weird things to boats" -Unknown