Hey guys,
  Well I have my Marie ready for her maiden and have been running in the engine. Went to my LHS to get more fuel and was told that running the OS 91 surpass inverted will make it run terrible and I should run it on it's side... Huh? Of corse this is After I cut the holes in the cowl in which i'm sure you can't get a replacement..  bigtim I see you're running your inverted are you having any probs? I see you said to run it inverted also.
At the moment the engine seems like it's running fine to me.. I'm kinda worried now.

Thanks