Operating In Salt Water Or Polluted Water; Operating At High Elevations - Mercury Optimax User Manual

OPERATION

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.
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