Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 27Get this manual

Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 27

MAINTENANCE
DRAINING GEAR CASE
1Place outboard in vertical operating position2Place drain pan below outboard 3Remove vent plugs and filldrain plug and drain lubricant,

GEAR CASE LUBRICANT CAPACITY
Gear case lubricant capacity is approximately 22.5 11 oz (666 ml)
CHECKING LUBRICANT LEVEL AND FILLING GEAR CASE
1Place outboard in vertical operating position2Remove the front vent plug and rear vent plug3Place lubricant tube into the fill hole and add lubricant until it appears at the front vent holeAt this time install the front vent plug and sealing washer4Continue adding lubricant until it appears at the rear vent hole5Stop adding lubricantInstall the rear vent plug and sealing washe before removing lu bricant tube

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