Okay, from the SIERRA MARINE BOOK, and cross referenced:
The Sierra Water Pump kit will be Sierra part number 18-3400
The OEM Water Pump kit is Evinrude/Johnson part number 0394711
If your motor has very little use, and that is common, you might just need to replace the impeller. If that is the case, your impeller is Sierra part number 18-3050. The OEM part number is 0386084
If you need other parts, here is the best place I know to go to look. Just google SIERRA MARINE CATALOG and you will find it, but here is a link:
http://www.marineengine.com/parts/sierra-marine/johnson-evinrude.html
As I shared, if you go to, (okay, maybe call first) your local NAPA auto parts store with the SIERRA MARINE part number they will usually be able to look it up in their computer system. Since you are running a Johnsrude, it will be in your best interest to find that guy who will work the system, and then stay with him. A local parts outlet is great to have.
As proof:
I just googled the NAPA website,
www.napa-online.com. I DIRECTLY typed the pump impeller part number 18-3050 in the FIND a PART box at the top of the page. Voila, it popped right up. Same thing for 18-3400 pump kit.
I know the OMC/Sierra/NAPA connection personally with my local store but had never tried it on-line yet. Sure enough....
