Hello, and thank you in advance for any help you may have. I have a Silver Series Lawn Boy with a 6.5hp Tecumseh engine and electric start. There is no throttle control or choke. I runs for about 5 seconds when I spray it with starting fluid and then quits. This morning it did run for 5 seconds on it's own fuel, but then quit too. I took the carb apart and cleaned it carefully. It is now the cleanest carb on the planet. I put it all back together, and I get the same problem. The fuel tank is clean and fuel flows properly, and the gas is new premium. Oil level is full. So with my limited (carpenter by trade) knowledge, I'm stumped. Can anyone suggest anything to look into ? Thanks!