As seen in Speedboat Magazine’s
June 2024 Issue.
502 Mag to 525 EFI
Dear Bob:
I have a 2000 29 Fountain with a Mercuiser 502 Magnum that has been damaged by being frozen. I am getting ready to swap the motor and install a 2004 Mercury Racing 525EFI that I purchased which has been recently rebuilt. What concerns should I have with this motor swap? Is the wiring harness and mounting the same for both motors? Please provide me with any information you think would be helpful. Thanks!
Charles Miller
Sandy, Utah