I have been having trouble with my wake plate as well, so I'd been looking up the actuator #. My code is different than yours (7L1H4), but it's 1.25" stroke and at the time I also came up with the 15122-001. Are you sure the 2nd letter is E?

Check the mounting hole sizes and you should be able to confirm.

http://www.mmimarine.com/mmi/index.p...prod_id=586480