I want to rebuild the carb on my Husky 350, serial # 031605001, 2003 I think. Is there a way to tell if the carb is Zama or Walbro w/o removing it? I'd perfer to wait to remove it and rebuild it at the same time so i don't lose parts or forget how it goes together. HLS parts says it has the Walbro, but it seems like they used both at different times. Thanks, Larry