RE: MDS 40 wont start
No reason to pitch the engine. Get some help. MDS engines are fine. Follow the hints above, make sure your needle is not set too rich, and make sure the fuel is good. Put a good plug in it and make sure it isn't flooded. Sounds like you have way too much fuel in it if it is spitting out the carb.
Are you using a starter or flipping it? If you don't have a started, it won't be easy to start it.