850cc Modified Runabout (850ccMR), also known as "Formula E" or FER are the biggest, most powerful Modified Runabout class. Look for heart-stopping noise and amazing speed when the 850 Runabouts hit the water. RequirementsMinimum Age: 18 years oldEngine: 40 cubic inches up to 49 c.i. manufactured as a service engine and associated carburetors. Exceptions are the Mercury MK75 6 cylinder, Mercury 650 xs, and Mercury 4 cylinder 62 c.i. 60 and 62 cubic inch 4 cylinder 650's are allowed.Speed: 90 - 100 MPH