Operating In Freezing Temperatures; Operating In Salt Water Or Polluted Water; Operating At High Elevations - Mercury 225 Pro XS User Manual

Fuel tank vent cap open or fuel drain valve on.
Fuel supply OK
Lanyard stop switch in "RUN" position and cord connected.
Remote control in neutral
Top cowl latches secure.
Make inspection checks listed in the Inspection and Maintenance
Schedule. Refer to Maintenance section.

Operating In Freezing Temperatures

When using your outboard or having your outboard moored in freezing or
near freezing temperatures, keep the outboard tilted down at all times so
the gearcase is submerged. This prevents trapped water in gearcase from
freezing and causing possible damage to the water pump and other
components.
If there is a chance of ice forming on the water, the outboard should be
removed and drained completely of water. If ice should form at the water
level inside the outboard driveshaft housing, it will block water flow to the
engine causing possible damage.

Operating In Salt Water Or Polluted Water

We recommend that you flush the internal water passages of your outboard
with fresh water after each use in salt or polluted water. This will prevent a
buildup of deposits from clogging the water passages. Refer to
Maintenance ‑ Flushing The Cooling System.
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

Your engine automatically compensates for high elevation changes. A
different pitch propeller may help reduce some normal performance loss
resulting from reduced oxygen in the air. Consult your dealer.
OPERATION
48