Protecting External Outboard Components; Gearcase; Positioning Outboard For Storage; Battery Storage - Mercury 300 XS OptiMax Manual

1. Remove the spark plugs and add approximately 30 ml (1 oz) of engine oil
into each spark plug hole.
2. Rotate the flywheel manually several times to distribute the oil in the
cylinders.
3. Install the spark plugs.

Protecting External Outboard Components

•
Lubricate all outboard components listed in Maintenance ‑ Inspection
and Maintenance Schedule.
• Touch up any paint nicks. See your dealer for touch‑up paint.
• Spray Quicksilver or Mercury Precision Lubricants Corrosion Guard on
external metal surfaces (except corrosion control anodes).
Tube Ref
Description
No.
Corrosion Guard
120

Gearcase

•
Drain and refill the gearcase lubricant (refer to Gearcase Lubrication).

Positioning Outboard for Storage

Store outboard in an upright (vertical) position to allow water to drain out of the
outboard.
Storing the outboard in a tilted position can damage the outboard. Water
trapped in the cooling passages or rain water collected in the propeller
exhaust outlet in the gearcase can freeze. Store the outboard in the full down
position.

Battery Storage

• Follow the battery manufacturer's instructions for storage and charging.
• Remove the battery from the boat and check water level. Charge if
necessary.
• Store the battery in a cool, dry place.
• Periodically check the water level and charge the battery during storage.
STORAGE
Where Used
External metal surfaces
NOTICE
94
Part No.
92-802878 55
eng