1985 Mercury Outboard V-300 V-3.4L Shop Service Manual, Page 200Get this manual

1985 Mercury Outboard V-300 V-3.4L Shop Service Manual, Page 200

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HYDRAULIC SYSTEM TROUBLESHOOTING GENERAL CHECKS
knobmake surall persons are clear of engine as engine will drop to lulldown" position when valve Is looened5 Re mo ve the manual release valveInsp