Need help with 30hp Mariner!!

[JAL1979]

I just bought a used 30hp Mariner. I do not know the year or anything about it. I would like to put a tiller on it (for my father in law who cant pull start). Also it has electric start but I am not sure how to go about changing it from the throttle to the motor.

Model# 30ELO
Code# 689L
Serial# 419864

Any suggestions would be great!!

Thank you in advance!