Hello, my neighbor has a 25 hp Merc. S/N: 0T086044. M/N: 2000 25ELH 4 ST. I haven't seen this motor yet and he is asking for help in getting it running right. I don't know if it's carbed(I assume it is?) or not, anyway he says it starts fine when cold, runs fine for a few minutes and then sputters and dies. Upon restart, runs extremely rough when giving it the gas and you have to keep adjusting the throttle to keep it idling. Any thoughts/ ideas are appreciated. Thank You. It did have the water pump replaced last year by a local mechanic because of an overheat alarm and since that time it hasnt run right?