Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 348Get this manual
MANUAL TilT ASSIST
Manual Tilt System Removal
A CAUTION
Remove cowling and remove all spark plug leads from spark plugs to prevent accidental starting while servicing outboard
i system may result of pressure in the shock cylinderIf the outboard is not in the full down position, such loss of pressure will cause the engine to fall to the full down position with potential for damaging engine or causing personal injuryTo avoid such Injury support outboard in the up potilt lock leversition