Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 498Get this manual
TILLER HANDLE
3Loosen the jam nuts and disconnect the throttle cables from the throttle lever
aThrottle CableThrottle Cable (Short) 4Disconnect the tiller handle wiring5Remove two screws (b) securing the tiller handleRemove the tiller handle assembly from the outboard