I have this engine that starts OK but revs up too high and no matter what adjustment I make to the governor spring it is still too high. The revs do drop a little but not enough for a nice idle. If I adjust any more the spring will be too slack. The governor arm is free from any obstruction and the spring is not caught on anything. I was wondering if there was an adjustment to the governor at the governor nut and bolt like there is on Chondas'. The procedure on those is to loosen the governor nut with the throttle wide open and turn the governor shaft fully clockwise (or anti-clockwise to slow it up). Can this same method be applied to Briggs and Stratton Quantum engines? Engine number is 12F802-1975-B1. Some photos (The governor bolt is in the middle photo):
