While cleaning the carbs on my '86 Evinrude 140 I discovered a small piece of white plastic lodged in one of my high speed jets. I'm hoping that this was the cause of my engine problems of late (going out of town so can't test for a few weeks).<br /><br />My question is, does anyone have any thoughts on where this piece of plastic might have come from? If something is disintigrating in my fuel system, I like to replace it now instead of waiting for more plastic to clog up my carb jets.<br /><br />In the course of looking for my engine problem I did already replace the primer bulb and fuel filter. Anything else I should consider?<br /><br />Thanks to all.<br /><br />Cheers.