Outside of the console? If so, it's probably the shaft seal. Pull the steering wheel, gain access to the point where the shaft enters the helm pump (you may have to drop the pump from the console, and there will probably be a plate covering the junction), remove and replace the hydraulic seal or O-Ring with a new one. Seal costs less than $10 US (if you can find them without the rest of the rebuild kit); if you can stand the down time, you can probably have a hydraulic supplier match the old one up for a couple of bucks.
Couple of posts on the entire process within the last year.