I recieved this motor along with a boat from a friend of mine. The problem is that I cannot get it to keep running. Will start with full choke but dies when you come off the throttle. New carbs, fuel pump, plugs, wires etc. A mechanic my friend was using had it running fine on a portable gas tank in the tank, but never could get it to act right in the water. would not run. Trying to decide whether to fool with it or scrap it for a mid 90's rebuilt Mariner 100 HP. Any Ideas, Please let me know. Thanks.