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Mercury 90 Operation Maintenance Installation Warranty Manual

Mercury 90
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Protecting Internal Engine Components
IMPORTANT: Refer to Maintenance ‑ Spark Plug Inspection and Replacement
for correct procedure for removing spark plugs.
Change the engine oil and filter.
Remove the spark plugs.
Spray approximately 30 ml (1 fl oz) of Storage Seal Rust Inhibitor into
each spark plug hole.
Tube Ref
No.
Description Where Used Part No.
119
Storage Seal Rust
Inhibitor
Spark plug holes 92-858081K03
Actuate key/push button start switch to crank the engine through one start
cycle, which will distribute the storage seal throughout the cylinders.
Install the spark plugs.
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.
NOTICE
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
eng 89

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Mercury 90 Specifications

General IconGeneral
BrandMercury
Model90
CategoryOutboard Motor
LanguageEnglish

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