The torque screw is on the back of the pump above the h&r. Should be an 1/8" hex with a 7/16" lock nut (probaby has a plastic tamper proof cover on it). Back it out to allow full fuel at rated rpm, but no backup fuel. To increase the fuel setting, you have to pull the top cover, throttle lever, governor stud and spring, then make the adjustment through an access hole in the housing. If it's a dm2, you only turn up one screw, if it's a dm4 you have to turn up both screws on both leaf springs and they have to be done perfectly equal so you don't throw it out of the eccentricity spec.