Kawasaki mule engine problem

[MCSSPimpin]

Hey, I've been tasked with fixing a mule 3010 4x4 KAF620E 617cc v-twin OHV (will not start).
After checking the basics, I found that:
The engine is overfull according to the dipstick and the oil looks and smells like it has water or gas in it;
The spark plugs are fouled;
The air filter is soaked with oil/gas/water or whatever it is (mud colored);
There is gunk around one of the valve covers.

What would be the best order of action to take in fixing this problem?
Thanks for any imput!

[Two Seasons]

Float seat stuck open is my guess. Carb needs to be removed and/or cleaned/rebuilt.

[mechanic kevin]

I am working on one now, same model. Do you know if it is a 6 or 12 volt fuel pump ? Thanks