1995 225 Pro Max engine

[Timearley]

I have recently purchased a 1995 225 Pro Max on a 20ft Hewes flats fishing boat. This motor has alot of power and I am playing with the placment on the 12" offset atlas hydraulic jack plate. I have looked in some of the manual and I cannot find the maximium factory rpm rating for this motor. I have been told it was around 7700 rpm. That is very scary to turn a motor that hard. i am runniing about 60 MPH at 6000 RPM's any suggestions.

 

[Dukedog]

Factory ECU will be 6750 give or take a few. Seen a couple would turn 69 ta 7 grand.......

 

[wired247]

Yep. 6750 unless the ECU has been modified. Mercury doesnt cut ignition like traditional RPM limiter does. It just goes full rich and some motors will go a little higher like Dukedog said . You can get the ECU modified by Simon Motorsports or you can get an aftermarket ACU from Brucatto with whatever RPM limit you want. Ive got a 7200 limit and the motor pretty much lives there.