Mercury 540 Bravo - Maintenance: Drive Unit and Trim Pump Fluids; Drive Unit Oil Level Check

DRIVE UNIT OIL
NOTE: The oil level will fluctuate during operation. The oil level should be
checked with a cold engine before starting.
1. Check the gear lube monitor oil level; keep the oil level at or near the
"COLD FILL" line.
2. If there is water at bottom of the monitor and/or if the oil appears a milky
tan, contact your authorized Mercury MerCruiser dealer immediately; both
conditions indicate a water leak somewhere in the drive unit.
NOTE: If the gear oil is green, use High Performance Gear Lube. If the gear oil
is amber, use Mercury Racing Gear Oil.
IMPORTANT: If more than 59 ml (2 fl oz) of gear lube is required to fill the
monitor, a seal may be leaking. Damage to the drive unit may occur due to
lack of lubrication. Contact your authorized Mercury MerCruiser dealer for
service.
a - Gear lube monitor
b - "COLD FILL" line
Tube Ref
No.
Description Where Used Part No.
SAE 85W90
Mercury Racing
Gear Oil
Gear lube monitor 8M0078015
87
High Performance
Gear Lubricant
Gear lube monitor 92-858064K01
POWER TRIM PUMP FLUID
1. Place the drive unit in the full down/in position.
2. Remove the fill cap from reservoir and observe the fluid level. The level
must be up to, but not over, the bottom of the filler neck.
COLD FILL
53517
b
a
MAINTENANCE
eng 53