Heavy Seas w/OB
The outboard prop coming out of the water isn't a function of the fact that it's an OB. It's the installation. Most OB installs are on a bracket that bolts to the transom. This does in fact put the OB at the far end of the boat, far from the center of gravity. When you start to pitch, the OB prop in that case is likely to come out. But boats like a Coronado 25, Columbia Challenger, The old Cal 27 (not the 2-27) and Catalina 27 have a mount that fastens the OB direct to the transom, not on a bracket. If you use a long or extra-long shaft OB, the prop's much less likely to breathe air. In my Cat27 I've been thru wave trains where the bow and stern are supported on adjacent waves, and a boat nearby could see my keel in between, but the prop kept on pushing. Only twice in 25 years in SF Bay and Norcal Coast in both Coronado 25 and Cat 27 has my prop bit air rather than water.When cruising with my inflatable aboard, I also carry a smaller OB for the dink that can act as an "auxiliary to the auxiliary" if necessary. (Same manufacturer, same fuel connections, just a smaller, lighter, less HP engine.)