Question, can say a 225 Mercury Pro xs be flashed to a 250?
Question, can say a 225 Mercury Pro xs be flashed to a 250?
Short answer is you “can” do it but it doesn’t give you any gains like it will on a Yamaha SHO. Unlike the SHO, there are a multitude of internal differences between a Merc 225 and 250.
USN Retired
2020 Basscat Caracal
2020 Mercury 225 ProXS 4s
I have a 250xs ecu if you want to see if any gains would be had by running one. I will loan it to you if you want.
No it can NOT, the blocks are different.Originally Posted by gamblermatt
You can NOT use a 250XS PCM on a 225 ProXS……….
NO- at least with successful results.
The 200, 225 and 250 each have DIFFERENT BLOCK PORTING. There are also other substantial differences.
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
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