Try to turn the prop a little. If it's obviously resisting, then the residual fuel has gummed up. Remove the glowplug. Pour a few drops of fuel in. Put a couple into the carb. Give it awhile to soak in. Try the prop again. If it's still gummy, pull the backplate and pour some fuel in. Give it awhile and try the prop again. That usually works for gummed up engines. And as mentioned, with the backplate off you can see what the rear bearing looks like.