OPERATION
58 eng
Operating in Saltwater 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.
Engine Break‑in Procedure
IMPORTANT: Failure to follow the engine break‑in procedures
can result in poor performance throughout the life of the engine
and can cause engine damage. Always follow break‑in
procedures.
1. For the first hour of operation, run the engine at varied
throttle settings up to 2000 RPM or at approximately half
throttle.
2. For the second hour of operation, run the engine at varied
throttle settings up to 3000 RPM or at three‑quarter throttle,
and at full throttle for approximately one minute every ten
minutes.
3. For the next eight hours of operation, avoid continuous
operation at full throttle for more than five minutes at a time.
Starting the Engine
Before starting, read the Pre‑Starting Check List, special
operating instructions, and Engine Break‑in Procedure in the
Operation section.
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