Even though I have primed, I have to inject starting fluid or another flamable item into front of carburetor cover before cold motor will initially start. I can continually kill and restart o.k. unless I let motor set a few minutes. Then I have to repeat the procedure. I have noticed, after motor has been running, then killed, with tilt up, a little fuel mixture drips from front of carburetor cover. My choke seems to work great. Anybody have suggestion as to what my problem is? The motor runs great once it is started.