Byron,
Fortunately, I did not have to rebuild my Teleflex Sea Star helm. Mine was leaking from the front of the helm, just behind the steering wheel. In doing some Internet research, I discovered there is a quad o-ring in the front behind the steering wheel that tends to go bad over time. I ordered the new o-ring from Teleflex for about 4 bucks and did the work myself. Very easy job. Remove wheel, remove round plate that covers the o-ring, and you are there. Swap it out and replace cover and steering wheel. I think that replacing the o-rings on the back of the pump is fairly easy as well. If you do a search on the ContinuousWave website (this is a Boston Whaler forum) you will find an extensive article with photos on how to completely replace all o-rings on the Teleflex helms. Good luck!