I have a 1987 4.3 litre gmc engine (OMC set UP) with a 2bbl carb. To be able to design a prop for my home built 23 ft aluminum bartender (double ender a Caulkins design) I need to know the spec's for MAX HP and at what is the RPM. I think the range is 4200 t0 4500 rpm. and the MAX cruising RPM...
