2003 Mercury 250XS, serial number OT652929
Built by Mercury Racing with the lower rev limit and high octane fuel. Am I limited to only the 2003-2005 250XS's for buying a used ECU or are there other models/years that will also work?
Thanks
2003 Mercury 250XS, serial number OT652929
Built by Mercury Racing with the lower rev limit and high octane fuel. Am I limited to only the 2003-2005 250XS's for buying a used ECU or are there other models/years that will also work?
Thanks
John Wolff
2003 Allison XB21 2+2
2003 Mercury 250xs
You are better off having your original ECU modified to fit your need than trying ECU's from different years. There are other parameters within the ECU that could have also been changed (such as fuel curve) that could be detrimental to your powerhead.
"Better to remain silent and be thought a fool than to speak out and remove all doubt."