I have a Homelite 30cc on an UltraStick that I’ve flown several times and it has been running great with a MA 16x8. This past weekend though, when I arrived at the flying field, it was raining. After about 10 minutes, the rain stopped and the sun popped out (typical weather in South Carolina) making the air very thick, muggy, and humid. When I cranked the Homelite, I could not get it to run as well as it had been. It would not rev up to the full RPM like it was supposed to. One of the guys at the field said it was the extreme humidity that was causing this. We tried adjusting the needles and it helped a little, but it still would not run correctly. Was it indeed the extra moisture in the air that was affecting it, or is there likely some other problem? This is my first plane with a gas engine and I’m still learning about them. I’m hoping to work on it this weekend. Thanks.