Most dealers tend to charge a 1/2 hour labor for this and claim it's a "computer fee" or whatever...
The maint. light does not mean anything is wrong. It simply comes on at certain hour intervals that are programmed into the ECU.
The most common time it will pop up is at the 10 hr mark, where Seadoo expects you to take your ski to a dealership for the "break-in maintenance" a.k.a. oil change. My advice is save money by doing your own oil changes and ignoring the maintenance light.