15 1/2" steering wheel vs. 13 1/2"

[sea sea rider]

I'm currently running the OEM 15 1/2" dia. steering wheel on my 1999 222 fisherman w/225 honda 4 stroke---going to changing wheels----does anyone have a feeling about changing to a 13 1/2" dia. wheel? Or, how many more revolutions would it take to turn the engine the same distance as the 15 1/2?

 

[sea sea rider]

Just purchased a 13 1/2" SS wheel w/turn knob from Discountmarinesupplies.com Manufactured by Seachoice. $119.95 free shipping. The part # is SCP 28481 Not having seen other manufacturers wheels up close, I couldn't compare quality, but this wheel appears to be made well and I believe it is 316 SS.