Posting the obligatory "How to correctly align your propshaft once in the boat's lifetime" doc.
Do it once, and you'll be able to rotate the prop with one or two fingers. I can do it with one, but it hurts. Two is a more reasonable measure on mine. It made a significant difference in smoothness when I did it.
Needing two hands suggests to me that you should do this.
1998 Maristar 200VRS