Originally Posted by tedted
Sorry I haven't replied in a while. things have been a bit busy. I suspect that more load on the engine wouldn't hurt anything. I'm more concerned about running at 2400rpm forever and doing only 6.5 knots. That seems to make no sense to me. With almost double the hp as the original engine I should be able to run along at 9 knots wide open. The hull is a semi planing. Very little deadrise. I still haven't gotten the boat back home. Winter just isn't giving up this year and I don't want to cross an angry Lake Erie with a boat that probably needs more attention than I am even aware of yet. Thanks for your input, Ted
IMHO, you are indeed correct, running at 2400 RPM is something to be concerned about. The sweet spot for your engines is 1600 to 1800 RPM, this is the design range for gensets, farm equipment and pumps. Harmonics are balanced best in this range by design as well as noise being less. Bottom line, reprop to get where most of the rest of us are.