I have an in line tester for spark and it lit up on every plug. When it started on ether it leads me to believe that the spark is good. I actually dropped the tank to check for dirt, and had just a little amount of dirt in it. I have put about 10 gallons of fuel in it already it only had maybe a gallon or two before I added more. The fuel pump comes on right away when the key is turned on, and keeps running. It will run about 30 seconds to a minute after the key is turned on.