"Harvey Gerst" wrote in message
...
I've seen everything from 12" x 13P to 13" x 17P for this motor as the
standard
size and pitch.

I know the new prop (that I got from the guy I bought the boat from) ain't
cuttin it at 13" x 19P.

Anybody?

There isn't a single answer to which prop is best. One factor is certainly
the horsepower of the motor, but the characteristics of the boat can play
into the equation as well.

What isn't "cuttin it" now?

How does your boat perform (what speed and RPM) under Wide Open throttle
(WOT) ?

Is this a two cycle or four cycle engine?

The motor is 33 years old, could it be losing horsepower?

If you need more hole shot then the standard answer is to go lower in pitch.
Keep in mind your top end, however. If you reduce the pitch by 10% then
your RPMs at top speed will be 10% higher, or perhaps your top speed will be
10% less or some combination of the two. It may be possible to find a shop
that will loan you a prop to try out. This is really common for I/O units
but it might be hard to find a shop that deals in props for a Chrysler
outboard. If you can find a loaner it will allow you to try it out before
you invest in a new prop.

Rod