I had work done on my boat about 8 months ago and ever since I got it back it hasnt ran right. Today I was in the process of taking out the external jets on the carbs, when my attention was brought to the small 8mm bolt head jet on the bottom of the carburetor bowl had been twisted off and PLUGGED!!! Wow I couldnt believe it nice work huh!! Well my question is, what is this particular jet called and what exaclty does it do, most of all where can I find one?!?! Any help would be much appreciated Thanks!!