I have a 1985 15 hp evinrude that used to run real good. the last time I took it out it started right up and ran about a mile wide open but when I let off the throttle it just quite and when I tried to restart it would start but only run 10 - 15 seconds. I had old gas 3 months old but since then I have bought a new gas tank and all new fule hoses and rebuilt the fule or vapor pump and took the carb a part and that looks good but cleaned it anyway. When I put some gas in the front of carb and pull 14 times it will start but it will knock and if I play with the throttle by the carb by hand I can keep it running so It will run but smells rich and smokes. It has a good spark also. any Ideas would be greatly appreciated. and thanks for your time. DW<br /><br />------------------<br />D west