The first rule of reprogramming your ECU is you don’t talk about reprogramming your ECU. :;:rockit Those who do it rarely talk about it, but when every other boat of a certain type goes x mph and someone has an identical one that goes x+5-10mph, pretty good chance it is “chipped”. like mentioned before if it is only programming that is the difference between a 225 and a 300 a lot of the guys have had simons or whipple do their programming. The biggest thing is can the gearcase and internals handle the extra rpms and wear. To me just the fact that a 20+k engine that has warranty may be voided if something happens to it is what holds up a lot of people from either telling about it or doing it. . Most people don’t have the patience to test 8 props and a bunch of different engine heights and loading combinations to get optimal performance when for 800$ you can add 10mph top end to your boat by chipping it. For the first few years I haven’t heard of a lot of issues on the vrods and yammies but seems like lately a few guys have been tearing them up, whether it is from a reprogramming or not who knows. I am sure it is like tuning a diesel if you do it and don’t beat on it to hard it will last forever but if you are constantly pushing it the life expectancies shorten.