As long as it was 2 stroke oil for a 2 stroke engine or 4 stroke oil for a 4 stroke engine you will be fine.
Looking over the web site it looks like they make 2 stroke and 4 stroke oils, I would suspect that wave runner or outboard (2 stroke to 2 stroke and 4 stroke to 4 stroke) are most likely the same oil.
It is pretty common the see 2 stroke rated TCW3 meaning it can be a universal application.
If you put 2 stroke oil in a 2 stoke or 4 stroke in a 4 stroke you will be fine.
On the other hand if it was 2 stroke into a 4 stroke crankcase I would change the oil ASAP.