240 Sport Jet. Powerhead on outboard

[Fishbum]

I know the driveshaft spline is different And have known of people changing a driveshaft in the 2.5 block and mounting sport jets on an outboard
but really trying to find out on a 2003 and a 2005 240 sj powerhead
what kind of outboard powerhead would it be equivalent to. ?
Maybe pro max? And wonder how different the computer on it would be
I have a couple of these engines Anyone know the real story?

[Ajskennels]

early 240 sportjet and 225 promax are the same block, sportjet block is just painted, my old sportjet block had NN stamped on it just like a promax, i would assume the M2 sportjet would be more like a 225x, i have a 225x but have no experience with the M2 sportjet so i can't compare them