Hello,<br /><br />I have a 2003 115hp Merc on my new boat
(well, new to me)<br /><br />I read the max rec rpm is between 4750 - 5250 rpm<br /><br />Before I knew this handy piece of info, I ran it up to 5500rpm<br /><br />Someone told me to try with a full load so I had 8 people & heaps of gear in the boat and still got to 5250 (had more to go)<br /><br />The boat can do 65kph and is really fast to plane/plain? , I also get really good fuel economy.<br /><br />Would it be worth it to change the prop to a higher pitch?<br />Would I gain much speed or lose fuel economy or power?<br /><br />If I keep this prop would it do any harm if I didnt run above the rec rpms?<br /><br />Thanks for all you help
<br /><br />Rhys<br /><br />P.S when the engine is trimmed all the way down it works harder and sounds quieter so I was thinking more pitch would also make it work harder/run quieter, not sure about this one though..