Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 50Get this manual
OUTBOARD MOTOR INSTALLATION
Disengagement of steeri ng link rod can rIull sharp turnThis potentially violent action can cause occupants to board exposing them to serious or death
Installing OutboardThumb Screw Models
OOllb,oalrd must transom one two ways: tened to transom with thumb screws, and mounting bolts (provided), or 2secured to the transom using the optional outboard mounting kit (shown below)Should the outboard strike an underwater object or be steered into sharp turnfailure to fasten outboard correctly to the boat transom with mounting bolts or optional mountkit could result in outboard ejecting suddenly off boat transom causing serious death, boat damage, or loss of outboard