my 1979 evenrude i just had new head gasket replaced and milled to get a good seat runs fine for two days filled gas tank up with proper mixture ran fine than had to down throttel at high speed due to sterring pin fell out lost control went into a circle till it slowed down every since it wont idle, pulled plugs were wet replaced with new plugs idled fine for about 2 min than same thing, runs fine on top end and all other ranges but wont idle will stop but will start right up, ran fine till incident of pin fell out and filled up with gas may drain gas and refule may be problm I dont know , need to get back out in my boat to relax avaitor