One of the most popular engines Mercury Racing ever built was the 500 EFI. This engine has been used in a wide variety of vessels from family sportboats to multi-engine poker run boats—and even offshore racers. As these engines reach rebuild time, we are often asked about upgrade options. With newer engines making more horsepower and torque, one of the first questions usually is, “What can we do to make more power?”
Budget and application are two key questions Potter Performance Engines’ customers need to answer before they upgrade their 500 EFI engines.