I wanted to 'up' the power as well to 90 or 115 , But the problem is that the porting is different on the engines , so you would have to change the Barrels, ECU ( through DFI, as they are £1000 new) and the throtle bodies, as a start , and I cant remember if the pistons are different or not ... but anyway its cheeper to sell the 75 and buy a 90 or 115 ....... for All things Eninrude , log on to www.boatsetup.com
and go to the Evinrude fourm , there is a couple of guys on her that work with Evinrude , and what they dont know, you could right on the back of a stamp !!!!! , buy your spark plugs through www.sparkplugs.com
€5 instead of €18 over here....
Great engines , we had over 1000hrs between 2 of them !!!!