Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 51Get this manual

Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 51

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OUTBOARD MOTOR INSTALLATION
2 Mark and drill four 1732 in(13.5 mm) mounting holes
3 Install the outboard so that the anti-ventilation plate is in-line or within in(25 mm) below the bottom