This one has me stumped. Carefully pressure washed this backpack blower and it won’t start. I am getting good spark to plug. Sprayed starter spray to carb inlet no luck. Disconnected kill switch. One thing I noticed, if I pump primer bulb then disconnect fuel inlet to carb, it was pressurized with fuel spilling out. Perhaps blockage at carb. All wiring seems dry And my spark checker shows a nice orange spark. Perhaps try another plug anyway?