2006 Johnson SD 30 HP 4 Stroke Outboards Service Manual, PN 5006592, Page 259Get this manual
Outboard Shift Systems and Safety
The outboard Shift System starts here at the remote control lever
.and ends here at the propeller
What is most important?
When control lever is in FORWARD, NEUTRAL or REVERSE
.shift linkage must match control lever position
What could happen?
FORWARD
propeller still powered (turning) unknown to operator, or outboard will START in gear, and boat will move suddenly