I can not get my Johnson to run correctly. The problem I am having is with the fuel priming solenoid. If the red lever is in the run position I can get it started but it wont stay running. Its like after it burns the fuel from the priming solenoid it just dies??? But if I move the red lever to the manual postition I can get it to idle. Why is it doing this? Ive checked the solenoid and its working fine. I bought this from an individual and the VRO pump is off and Im mixing 50:1. Also how can I check the spark by myself...kind of hard to turn the engine over and be back there at the same time?