I'm trying to get my TT Pro .46 running again but am having trouble. It was very stiff at first so I put some fuel in the hole for the glow plug and now it turns easily. I know there is fuel flow as when I try to start it and I turn the plane on its side to dump extra fuel out the muffler a lot of thick, darker fuell flows out. The glow plug is good and am using an electric starter. Am I flooding it or something?

Thanks!