Gearcase Lubrication - Mercury 135 Verado FourStroke Operation And Maintenance Manual

OIL FILLING
1. Remove the oil fill cap and add recommended oil to the midpoint of the
operating range (midpoint of cross hatched region). Adding approximately
6 liter (6.3 US qt) will bring oil level to midpoint of cross hatched region.
2. Install oil fill cap.
3. With outboard in water or cooling water flush hose connected, idle engine
for five minutes to check for leaks at the oil filter.
4. Stop engine and check oil level. Refer to Fuel and Oil ‑ Checking and
Adding Engine Oil.

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.
2. Remove the propeller. Refer to Propeller Replacement.
3. Place the drain pan below the outboard.
eng
MAINTENANCE
91
14770