Operating At High Elevations; Operating Outboard As An Auxiliary Engine; Pre-Starting Instructions - Mercury 9.9 EH Manual

OPERATION
If you keep your boat moored in the water, always tilt the outboard
so the gearcase is completely out of water (except in freezing
temperatures) when not in use.
Wash the outboard exterior and flush out the exhaust outlet of the
propeller and gearcase with fresh water after each use. Each
month, spray Mercury Precision or Quicksilver Corrosion Guard on
external metal surfaces. Do not spray on corrosion control anodes
as this will reduce the effectiveness of the anodes.

Operating at High Elevations

IMPORTANT: To prevent serious damage to the engine caused
by a lean fuel mixture, do not operate your outboard (if the jets were
changed for high elevation) at a lower elevation unless the jets are
changed again to correspond to the new elevation.
Operating your outboard at an elevation higher than 750 m
(2500 ft.) above sea level may require a carburetor jet change
and/or different pitch propeller. Consult your dealer. This will
reduce the normal performance loss experienced as a result of
reduced oxygen in the air causing an overly rich fuel mixture.

Operating Outboard as an Auxiliary Engine

If the outboard is used as an auxiliary engine, stop the engine and
tilt the outboard out of the water when using the main power
source.
IMPORTANT: The outboard must be restrained from bouncing
while operating the boat using the main power source. Bouncing
can damage the outboard and boat transom.
Pre‑Starting Instructions
1. Attach the fuel connector to the engine connector. The
arrow‑mark on the primer bulb should be facing the engine.
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