the outboard runs fine and pumps water out with muffs on but when i put it in the water it doesn't pump any water at all. could it be that the impeller needs replacing? what do you think?thanks
No question about it. Replace the impeller. It's easy - the hard part is getting the fasteners off without breaking a stud. Be patient and use liquid wrench and give it an hour or more to work. Tap the nuts and then try them. A final resort would be careful (very careful) use of a propane torch to free the nuts. If not replaced, eventually blades will break off the impeller and foul the cooling system.... which can be a very expensive and difficult repair.....overheating is also very bad for the engine.... so fix the water pump.
