If you are testing your new boat and find that it does not achieve
recommended maximum RPM at WOT. That would be bad for the motor right? Too
much load. Then you would change to one that is a lower gear so to speak.
And if you over compensated and the motor went over the recommended maximum
RPM at WOT. That too would be bad for the motor, right? Over revving. When
testing should you take it to the recommended maximum RPM and see if you
have any throttle left?

"Shortwave Sportfishing" wrote in message
...
On Sun, 26 Feb 2006 18:12:42 -0500, "RCE" wrote:


"Injam" wrote in message
hlink.net...
Thanks to all who responded. It helped---------kinda.

Sincerely,
Injam


Injam,

Like Wayne said, the right prop for your boat is going to be a bit of an
experiment exercise. If you are buying a new boat, confirm with the dealer
that he will assist you in obtaining the optimum pitch after you take
delivery and have some experience with it. A 25 hp difference in engines
is
not going to be a huge factor. Things like how you load the boat, how
many
people typically ride with you, etc. will probably have more of an affect.
The simple method is to determine what pitch allows your engine to achieve
it's recommended maximum RPM at WOT. I think you will find that a
compromise of sorts will be required though because the ideal pitch will
change, again based upon how you load the boat.

I had an old Century I/O years ago and had two props. I used the higher
pitch when I was just cruising by myself or with one other person. If
four
or more people showed up for a ride, I changed the prop to a lower pitch.

Very true and well stated.

The thing I would add is that most props are compromises anyway for
the exact reasons RCE, Wayne B and other have mentioned.

One of the things I did with the Ranger when I bought it was pretty
simple with regard to props. I asked what was the best prop for speed
and the best for load and split the difference.

That's what your dealer will probably do anyway.