HM80 surging under load. Original Message Nov 24, 2009 8:03 pm
I pulled the carb off my ST824 to clean it out. Just put it all back together and put it back on the machine. I set the baseline adjustments to the idle and main mixture screws per the tecumseh HM80 service manual. Adjusted the screws at high and low throttle settings like the manual states on got it running smooth at all throttle settings. Problem is when I engage the impeller with the throttle full open the engine starts surging. I'm new to playing with carburators, any ideas?
