1999 Sportsman is leaking hub fluid on the inside of the front left tire. I assume it is the inner seal for the hub??? I have looked at partsland.com Is #3 the seal I need? thanks

http://partsland.com/index.cgi?N=129...00-FRONT-WHEEL

Or is it #13?
http://partsland.com/index.cgi?N=129...00-FRONT-STRUT

 

You could try taking it apart and cleaning everything up first. The exact same thing happened to my magnum after my wife was hogging it through some pretty severe mud. When I tore it apart to examine the seals it turned out to just be mud and grit so pack into the seal that it started leaking. It didn't look bad after washing it from the outside but was oh so obvious when torn down. After the thorough cleaning and back together it was good as new. If that doesn't work replace the seal.

 

It's #3. Just did this job on my 2000. Not too bad. Getting the old seal out without gouging the hub is probably the hardest part. Most of the work is just cleaning up/out the hub before reassembly.

 

Sent you a PM man, I have two OEM seals new in box. I sold my 02 and they wont fit the one I have now. Not sure if you ordered them yet but I figured Id try and help you out.