That motor uses the carbon seal, well a carbon case with a plain o-ring inside…I tend to use 2 curved picks to gently hook opposite sides, then gently pull upwards.
The carbon part is still available, but pricey:
0302036 – Seal (302036) <small>[ More info ]</small>
<small>$54.99</small>
<small class=”in_stock”>10+ In Stock.</small>
http://www.richardsoutboardtools.com
classicomctools@gmail.com