I installed it today, it started the first time with almost not power, and tan for a minute or two. Now it won't start at all. It has compression and spark, and I'm getting the occasional drop of gas out of the muffler after trying to start it. The kill switch is disconnected, the clutch is engaging and the throttle is working fine. I'm not sure what my problem could be! I've heard that some won't start unless the white wire is under load, is that true?