I have a 2002 I/C Intex Platinum engine. I have to modulate the engine with the choke when running without the PTO engaged...it runs 99% and when I engage the PTO...she cuts at about 85% but I have to fool with choke on and off. I use seafoam in every tank of gas....Today I dismantled the carb....cleaned it with laquar thinner and put a pin through all the orifices I could find. I couldn't get the two screws loose on the bottom of the carb but did slosh lots of thinner in it. Actually got it back together, with the help of pictures I took while taking it apart. NO CHANGE in performance. My question: can the armatures (iginition coils) have any effect on the surging? There is a full gas flow to the carb. Any other ideas. I hate to buy a new carb ($300+) and then find out I should have checked other areas. Pochie