I have a neighbor who has a Farmall Super H that will run great, and has plenty of power as long as you keep it revved up at least half throttle, but when you idle it down low the sound of the engine starts coming and going. Is it the Governors starting to go bad, or the carb. needs adjusting? If it was to be the Governors going bad, will a set of Governors from a regular Farmall H fit in a Super H, and if it's the Carb. needing to be adjusted, where do I start adjusting? How far in, or out should the fuel screw, main jet screw, and the idling screw be turned to, to get him a place to start at?