I am a new boat owner and it didn't come with a boat or engine manual so apologize for the dumb question. I have a 2002 Mercury 150XL SWB engine.
In reading through some of these posts, I saw someone said you only have to do the gas/oil mix if you have a carb engine; and no need to mix if oil injected.

How do I know if I have a carb or oil injected?

Any help/tips/etc would be appreciated.