How do you change the pump impeller in a 1983 Suzuki dt9.9 outboard motor?

Hi, I'm currently having problems with my boat, a Suzuki dt 50 1983. I'm trying to change the impeller and i was wondering if you could possibly send me a video of this being done or a detailed list of what is meant to be done. If you would contact me as soon as possible it would be very much appreciated.

Thank you:)