34 MPH sounds awfully slow for the top end with that configuration. Just in
case you are new to boating...

Are you using a GPS or the boat's speedo?

Have you trimmed the motor up a bit (in fairly calm water) to increase speed and
RPMs?

Dan


Jon.boston wrote:

The propeller on my boat has a 13" pitch.. When I use the calculator
the speed agrees with what I'm seeing.

My question now is: What prop pitches do people use on a 23Ft outrage
with a 225 Merc? I've seen notes mentioning 17" and 19" pitch.. Any
advice on what is put on as a stnadard would be great.

I bought this boat used, 55 hours on the engine, and I can't beleve
they would sell it with a 13" pitch prop... The list of props for
this engine don't seem to even go down to 13"!

Any clues would be appreciated...

Thanks,
Jon