In another thread here, someone posted this:<br /> "As a sidenote I have the partlist for the 40/50/60 EFI 4Stroke (it's the same partlist for all three) and the only difference is in fact the computer (ECM) and decals.<br />Here is the # for the 60 ECM:<br />89195238T ECM 1 $783.00"<br /><br /> Here's the thread:<br /> http://www.iboats.com/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=29;t=020137 <br /><br /> I posted this Q here vs there as I didn't want to trash his thread but we have an '03 Merc EFI 4 Stroke 40HP that could use more power (boat only goes 28 mph) and the boat's rated for 60HP. Not sure I'd like to spend almost $800 to replace its ECM but is that really all that's different between the two? If so, anyone know of a cheaper parts source?