Here is the link. When you get there, click on the part diagram in the lower right of the screen. It will launch a new window for you to look up diagrams.
It's kind of complicated, so I'll do a short walk through.
In the first drop down menu, select your product. The choices are things like Evinrude, Johnson, OB accessories, electric, quiet rider, etc.
In the next box, you can select normal or advanced search. I always used the normal search, it got me right where I wanted. After you do that, click the "Go" button. It's right next to the search drop down menu.
A box will then pop up that says "search a catalog." You have to select your product again from a drop down menu. Make sure to pick the right one or you won't get where you're trying to. You can get any evinrude engine part by selecting "evinrude." For accessories like throttle controls, OEM fuel tank part numbers, or dash instruments, select accessories. Simple enough. On some years you can see the accessories from within the "Evinrude" search.
Next a file tree will come up on the left side. Just scroll around until you find your year, then click it. It will open up to more files listing the different horsepower options for that year. Click your engine's horsepower.
Next a tree listing the model numbers for that year and horsepower will open up. For example, there will be a list for the different models of 30 horse engines made in 2000. Different number depending on if it's tiller steer, remote steer, electric start, pull start, shaft length, four stroke, two stroke, etc. You'll need to know your model number to get the right one. Click your model number.
Next a tree listing the different parts systems will open up. At this point, go to the box that says "Text to search for" and enter your part description. Spelling counts! If you don't know how to spell the whole word, just put in the first three letters. You'll get more results, so you'll have to click the right result for the correct diagram. For example, if you search for "impeller" it will give you a link to the gearcase diagram for the results. Click the link to the system that contains the part you're looking for. It will open another new window with the diagram.
Zoom in on the diagram to look for your part, if you know what it looks like. There will be a number by it. Take that number and look for it in the list in the lower part of the window. That will list the part name and part number. You can then click "add to my list" and it forms a shopping list for you, though you can't order factory direct. If you don't know what the part looks like, but know what it's called, you can go straight to the lower list and look for that name, but you might be going through a list of well over 100 parts for any given system.
Go back to the file tree window and click "View Pick List" in the upper right to view your list. You can then print it or write the stuff down, and do a dealer search, which will open a new window.
Have fun. It's really not as hard as this makes it sound.
Maybe I should have a scavenger hunt to see who can come back the fastest with a list of parts I want? LOL. Just to get everyone familiar with it. Maybe save Robert some work.