runs only on choke
My pressure washer has a Briggs engine Model Number 150212, Type 0122 E9, Code 070612 with a float bowl carb. It was running along just fine, when suddenly it just quit with kind of a low pop backfire noise. Hoping the problem was simply I was out of gas, I checked the tank and saw it was almost empty, maybe empty enough to cause it to quit. Filled er up with gas and tried starting it and it would run, but only on choke. Move from choke to run and it immediately cuts out. I pulled the bowl off the carb thinking maybe crud in there, did see very slight trace of fleck, emptied it out wiped it out, put it back together and tried starting again. Same thing. Only runs on choke. I took the main jet off and made sure it was clear, I poked a fine tag wire all the way through the holes in it to make sure, then reinstalled and tried again. In fact I did that twice to make sure. Exact same result, no change. So, thinking maybe a failing gasket (air leak), while it was running (with choke closed) I sprayed some carb cleaner behind the carb along the mating surface with the block if the engine to see if the tempo would change, but it didn't change at all. Also I took the fuel line off the tank and examined the entire line from the tank outlet to the line outlet, and all is clear there, no obstruction or restriction. Put things back together and tried again. Same result. Absolutely no change. Runs when carb is choked only. Move to run and it immediately cuts out. Any ideas what could be causing this issue and why what I've tried so far hasn't helped? Must be something I'm missing, it cant be this complex.