leaking around prop shaft

[zkprostar]

I have a leak around the prop shaft on my 2007 ps 197. I understand that a few drops of water will leak in while the shaft is spinning but it is leaking while the shaft is stopped. Is there anyway that I can fix this seal? The boat has less that 200hrs. and has been garage kept, I'm assuming that the seal is still good and can be tightened. I need to know how to check this. Thanks for your input