Hello all. I have a 1985 Toro 3521 blower that belonged to my dad. He kept it in wonderful condition and I have it now that he's passed away. 2 years ago, I took it to a Toro authorized repair place and it hasn't run right since. At idle and full throttle, and no load, it purrs like a kitten, no hesitation, no surging. The only way I can keep it running during load is to only take a path about 30-50% of the width and only use speed 1 on the transmission. The more snow, the smaller the path. I might as well use a shovel. I see there is a governor lever and a spring that attaches to the throttle lever and the carb, but it only seems to increase the engine speed when I manually move it. Once I start throwing snow, shouldn't that governor open the throttle more? If so, it isn't working. Any suggestions would be much appreciated.