Shrek, RE:pitfalls of raising the motor up on a jack plate. If the jack plate is electrically adjustable from the console I don't see any issue. Install a water pressure gauge so you know what you have and try it out. Raise the jack plate too high and the water pressure will drop off. Raise it too high and it may ventilate the prop getting on plane or in turns. What motor is your 225? If you are turning it to redline or close you can't gain much by putting a bigger prop on it.
Props are somewhat of a trial and error. Ferm sent me to Ken @ prop Gods who is a wealth of knowledge on props.(Ferm Spare School and others on here too for that matter)
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