
With the boat back in the water the most pressing issue was to get the propeller pitch right. Farron Peffer at Beta Marine was adamant that we should strive to get the max RPM at wide open throttle (WOT) within 50 RPMs of the designed 3,600 RPM. He explained that even though we might never operate at max RPM having the pitch and diameter of the propeller correct would insure the engine was operating in its sweet spot at any RPM and would not be working in an overloaded capacity which could shorten it’s life. The other thing Farron mentioned was you want to make sure you can achieve the full 25 HP if necessary and you can’t do that if you can’t attain max specified RPM when under load. Last, he said it is better to be slightly over max designed RPM than under.
Continue reading