aa, This is a long shot and to let you know the forum tries...In the good ole days on foreign iron a 113/117 might have meant approx 1/10 th of a mm or .1 x .039" which could be the hole dia to feed gas to the inrushing airstream. If this could be then I would not worry about interchanging since the difference is slight. Of course I may be simply be wrong. If you look through the holes I doubt you can tell the diff. By now you are probably up and running.:laughing::