Gearcase Lubrication - Mercury 10 TwoStroke Operation, Maintenance & Installation Manual

Gearcase Lubrication

When adding or changing gearcase lubricant, visually check for the presence of
water in the lubricant. If water is present, it may have settled to the bottom and
will drain out prior to the lubricant, or it may be mixed with the lubricant, giving it
a milky colored appearance. If water is noticed, have the gearcase checked by
your dealer. Water in the lubricant may result in premature bearing failure or, in
freezing temperatures, will turn to ice and damage the gearcase.
Examine the drained gearcase lubricant for metal particles. A small amount of
metal particles indicates normal gear wear. An excessive amount of metal
filings or larger particles (chips) may indicate abnormal gear wear and should
be checked by an authorized dealer.
DRAINING GEARCASE
1. Place outboard in a vertical operating position.
2. Place drain pan below outboard.
3. Remove fill/drain plug and vent plug and drain lubricant.
a - Fill/drain plug
b - Vent plug
GEARCASE LUBRICANT CAPACITY
Gearcase lubricant capacity is approximately 200 ml (6.8 fl oz).
GEARCASE LUBRICANT RECOMMENDATION
Mercury or Quicksilver Premium or High Performance Gear Lubricant.
CHECKING LUBRICANT LEVEL AND REFILLING GEARCASE
1. Place outboard in a vertical operating position.
2. Remove vent plug and fill/drain plug.
3. Remove fill screw and place lubricant tube into the fill hole.
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MAINTENANCE
a
b
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