Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!
If it runs on starting fluid, it has spark s, so it has to be lack of fuel. Did you remove the carburetor and go through the needle valve passage and the main jet, the bowl bolt and the passage the bowl bolt screws into? This is how fuel is sucked into the cylinder.
Remove the ground wire from the coil and see if spark is better. The wire is just for kill.