Re: 1978 evinrude 115 impeller replacement?
Welcome to iboats Gator.
I would say you are due. Most agree that every 2 to 3 years is standard, depending of course on hours used and the conditions that the outboard is used in. It is a fairly inexpensive part as you know, and can be changed in under an hour. Its failure is catastrophic. Personally, I change mine every second season, along with the t stats. I like having the peace of mind, plus I know the price of replacement power heads.