Been a few years since ive been on here but i need help. my o1 isnt running right, or at all really. ran fine with the jetting it had last year and now starting it up this spring it wont run. ive cleaned the carb, put new gas in, put new plug in. if i take the plug out its always nasty looking and i can clean it and throw it back in and it will run for about 45 seconds. i dont get it. the blug gets like a nasty grayishness to it too. dont have a clogged filter, exhaust isnt plugged. when im trying to start it if i hold it wide open itll pop off a bit but im getting a bunch of smoke coming from the airbox. still running the auto oil injection. spark is nice and blue. what do i do???