Impeller kit 1978 Evinrude

[twink90]

I am running into a problem locating the proper impeller kit for our motor. When I click on 85 HP it says fits 1979-& up. Well according to my research our motor is a 1978. The tile says 1979 but 85899C shows it as 78. Is this a problem I will keep finding when getting parts for this boat? We only have one boat place around us, and his prices prove it. Not knowing, we bought an impeller from the guy and spent almost $50!! I can get a kit for that price.

Thats why I am trying to get parts online. This will be our first time changing an impeller so any tips on getting to it would be awsome. We do have a Seloc repair manual, and the owners manual from Ken Cook.
Thanks again...