Home › Forum › Ask A Member › 30hp etec prop opinions › Re: 30hp etec prop opinions
I used a tach on the motor today, and ran it through about 10 trials of WOT for a 1/2 to 3/4 stretch of water. I found that it was running between 5820 and 5880 RPM, depending on the typical load and configuration I use it in (1 passenger, plus 45lbs of ballast – lost 60RPM with the extra ballast).
Given what I’m reading I’m guessing the highest pitch I should aim for would be a 14" pitch (currently have a 12" pitch).
Opinions? From what I’ve been reading, I’m seeing that for each 1" of pitch you add, you lose 150-200RPM.
What is the effect of diameter as well. I mean, the stock prop on this motor is a 10.3 x 12". The props I’ve been looking at are 10"…so does a 1/3rd of an inch diameter decrease negate some of the RPM loss?