Checking Power Trim Fluid; Gearcase Lubrication - Mercury 150 Operation, Maintenance And Installation Manual

Checking Power Trim Fluid

1. Tilt the outboard to the full up position and engage the tilt support lever.
2. Remove the fill cap and check the fluid level. The fluid level should be
even with the bottom of the fill hole. Add Quicksilver or Mercury Precision
Lubricant Power Trim and Steering Fluid. If not available, use automotive
automatic transmission fluid (ATF).
Tube Ref
Description
No.
Power Trim and
114
Steering Fluid

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 the outboard in a vertical operating position.
MAINTENANCE
27877
Where Used
Power trim system
58
28460
Part No.
92-858074K01
eng