Operation; Operating In Freezing Temperatures; Operating In Saltwater Or Polluted Water; Engine Break-In Procedure - Mercury 5 HP FourStroke Propane Operation, Maintenance And Installation Manual

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 the trapped water in the 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 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 Engine Break‑in Procedure.
Without sufficient cooling water, the engine, the water pump, and other
components will overheat and suffer damage. Provide a sufficient supply of
water to the water inlets during operation.
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OPERATION

NOTICE
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