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Mercury 40 4-Stroke User Manual

Mercury 40 4-Stroke
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MAINTENANCE
61
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 fine 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 a drain pan below outboard.
3. Remove vent plug and fill/drain plug and drain lubricant.
a
b
26973
a - Drain pan
b - Vent plug
c - Fill/drain plug
GEARCASE LUBRICANT CAPACITY
Gearcase lubricant capacity is approximately 440 ml (14.9 fl. oz.).
CHECKING GEARCASE LUBRICANT LEVEL AND REFILLING
GEARCASE
1. Place outboard in a vertical operating position.
2. Remove vent plug.
3. Place lubricant tube into the fill hole and add lubricant until it appears at the vent hole.
IMPORTANT: Replace sealing washers if damaged.
4. Stop adding lubricant. Install the vent plug and sealing washer before removing the lubricant tube.

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Mercury 40 4-Stroke Specifications

General IconGeneral
BrandMercury
Model40 4-Stroke
CategoryOutboard Motor
LanguageEnglish

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