Congrats on the new boat. It's a beauty! Like yourself, I spent 22 years on an I/O before I was finally able to get into my dream MC. Maneuvering it was definitely a learning experience, but you'll get used to it. As mentioned above, check the shaft packing for leakage. I'd also check all the water hose connections on the engine. My bilge pump has never switched on because of shaft packing, so there is definitely something amiss.
1998 MariStar 225VRS, 350ci LT1