I have a 1991 15hp force. I was having trouble with it running propperly when i first start it up and put it under load at WOT it runs out fine then after 2 or 3 mins. it starts to surge like its getting fuel and then not getting fuel when i squeeze the primer bulb it seems to smooth out a little if i slow to idle then go to WOT again it seems to bogg very bad to the point where it quits . when i restart the motor it boggs still in neutral after a minute or 2 it picks up rpm so i was wanting to know if this was a carb problem (maybe Float sticking) or a possible ignition problem. I already replaced fuel pump and still no change........Any help please???