I'm having problems with this engine. It starts with absolutlly no problems <br />and anything up to half throtle It can handle. But if you try to drive it aggresivelly<br />it will die on you after only a few minutes. I think it running too rich since after doing this <br />the spark plugs are ussually wet and sowhat dirty. How do you adjust the <br />fuel intake on these engines? Is it a wise thing to do?