I have a small stationary generator powered by a Quadra 35. 400 watts. Generator is about the size of a car alternator. Whole thing weighs about 15 lbs. There is a small airvane in the blower housing connected to the carb. It's a governor to keep it at a constant 115 volts, no matter what load is on it. Muffler is about 4 times the size of the stock Quad muffler.