Hello roeboat109.
Is this a Dura Force engine? If so, I think you probably have to split the crankcase and there is a groove the new seal fits into, if I remember correctly. Don't let that scare you, it's not too bad. I did mine a few years ago and it was about an hours job, start to finish.
If it's not a Dura Force, you won't have to split it, I don't think. Good luck and let us know if you have any problems or questions.