I agree it probably needs repair. No doubt you have a freshwater boat. Last 4th of July I was going out on my buddy Rinker with bravo 3. hadn't been out in years. I started it on hose and it Leaked oil out the outdrive bad behind the prop. I told him we aint going anywhere. He said yea we are I said you smoke $4k? outdrive, he said I don't give a ****. I let it run for a while and I guess the seal swelled it stopped leaking and hasn't leaked since!!
If you want to TRY at your own risk check level in gear drive. start engine on hose. let it run 15 minutes. did you loose level? if not you may get away with it, my buddy sure did. If seals sit along time they take a set, getting lube going to them and they will swell.
If you do go into outdrive ensure you upgrade the intermediate shift shaft bushing. very easy.
Do you have remote lube gear reservoir? If so I use the boat today and keep an eye on it. I had a boat with no lube reservoir for 30 years, back when men were men.