WA25 is Wizard version of Mark 30 so that should be the correct kit.
Double check by asking vendor for the kit that is correct for
Wizard WA25 Serial Number XXXXXXX. Old Mercs and others are aware
that Kiekhaefer made Wizards as well as Mercurys. Sometimes there are
running changes so serial number may be needed to identify parts correct
for a specific outboard.
Have fun
Louis