I have a old weedwacker engine that i want to convert to an rc airplane motor. Can anyone tell me how to convert it or where to find articles? Thank you!

Start by posting a picture of what you have?

Then scan down through the pages of this conversion forum. This subject has been covered many times. You might even find your exact engine?

We can help you with your engine.

Brickhead

As w8ye pointed out.....you are in the right place. Loads of information within this forum regarding Ryobi, Homelite, Echo, and other conversions. Give us a description of what you have and I am sure we can point out some good threads that detail your particular engine if it is a fairly common type weedie engine.