if there was some water on the impelled it might be ok that might of lubed it enough and that is a big question. If it was me and water is coming out like it use to with the same pressure. There is still a impeller and water cooling is working. If not that old, You may find out after a day of work the impeller you replaced is normal for a impeller with that age. That what i think.
5 min is a very long time without water, I'd change it for sure. If these fit your motor, I am a big fan of them, I find them to work better than the fancy dual inlet ones. Those can have cups that are made of thicker rubber that's too stiff. The Merc/Quicksilver ones are made of thinner more flexible rubber, that seal better and the rod and clamp prevent them from slipping off.
5 min is a very long time without water, I'd change it for sure. If these fit your motor, I am a big fan of them, I find them to work better than the fancy dual inlet ones. Those can have cups that are made of thicker rubber that's too stiff. The Merc/Quicksilver ones are made of thinner more flexible rubber, that seal better and the rod and clamp prevent them from slipping off. View attachment 405183
