My engine was purchased in St. Martin and is the 2hp 2 stroke. Not sure about what fuel in the islands is what. The only one I know that is bio fuels is Colombia. Funny with what you mentioned that the 15 hp runs fine on the same fuel 2 stoke also and the 2 hp doesn't . Maybe I need a new jet. Maybe I'll just live with it. Not going fast with that engine anywhere.

Go Slow
Sail Far
Stay Long